新人教版九年级第四单元精选练习题附答案
人教版九年级英语Unit4单元练习(含答案)
Unit41.A student in my class said to me,”If I______our math teacher,I ______make math learning easier and more interesting instead of giving the kids much homework to do every day.”A.were; wouldB.am;willC.was;could2.—Have you seen the CCTV news on TV?—Yes,_____children had a good festival on the________Children’s Day.lions of;sixtyB.ten millions;sixtiethlions of;sixtieth3.—Can I help you,dear?—Yeah,I don’t know_______a banana milk shake.Maby you can teach me.A.what to doB.when to makeC.how to makeD.why to do4.Most British high school children______uniforms at school.A.wearB.dressC.put upD.dress up5.—I guess buying her a Teddy Bear for her birthday.—_______someone else brings the same present?A.IfB.WhatC.What ifD.How about6.I’m too nervous to know______to say.A.whatB.howC.whenD.why7.There are _______websites on the Internet and there is a lot of useful information on the websites.lionslion oflions ofD.five millions of8.What______you fall and hurt your legs?A.ifB.whetherC.weatherD.though9.If I_____you,I’d take a small present with some nice words on it.A.wasB.wereC.amD.be10.Believe yourself.You’re better than________.You’re the best. Wish you success!A.anyone elseB.someone elseC.else anyoneD.other anyone11.The sense of happiness will increase if you______what you like to do.A.doB.didC.will do12.I’m waiting for my friend.If he______,I_______swimming alone.A.doesn’t come;will goB.won’t come;will goC.will come;won’t goD.don’t come;will go13.根据句子意思及括号中的提示完成句子。
人教版九年级语文下册第四单元基础知识阅读练习题(含答案)
人教版九年级语文下册第四单元基础知识阅读练习题（含答案）一、阅读。
(一)论求知(英培根)求知可以作为消遣，可以作为装饰，也可以增长才干。
当孤独寂寞时，阅读可以消遣。
当高谈阔论时，知识可供装饰。
当处世行事时，知识能增进才干。
有实际经验的人虽能够处理个别性的事务，但若要综观整体，运筹全局，却惟有掌握知识方能办到。
读书太慢会衰惰，为装潢而读书是自欺欺人，只按照书本办事是呆子。
求知可以改进人的天性，而经验又可以改进知识本身。
人的天性犹如野生的花草，求知学习好比修剪移栽。
学问虽能指引方向，但往往过于泛泛，还要靠经验来赋予形式。
狡诈者轻鄙学问，愚鲁者羡慕学问，聪明者则运用学问。
知识本身并没有告诉人怎样运用它，运用的智慧乃在书本之外。
这是技巧，不体验就学不到。
不可专为挑剔辩驳去读书，但也不可轻易相信书本。
求知的目的不是为了吹嘘炫耀，而应该是为了寻找真理，启迪智慧。
书籍好比食品。
有些只须浅尝，有些可以吞咽。
只有少数需要仔细咀嚼，慢慢品味。
所以，有的书只要读其中一部分，有的书只须知其中梗概，而对于少数好书，则要读通，细读，反复地读。
有的书可以请人代读，然后看他的笔记摘要就行了。
但这只限于不太重要的议论和质量粗劣的书。
否则一本书将像已被蒸馏过的水，变得淡而无味了!读书使人充实，讨论使人机敏，写作则能使人精确。
因此，如果一个人懒于动笔，他的记忆力就必须强而可靠。
如果一个人孤独探索，他的头脑必须敏锐。
如果有人不读书又想冒充博学多知，他就必须很狡黠，才能掩饰无知。
读史使人明智，读诗使人智慧，演算使人精密，哲理使人深刻，道德使人高尚，逻辑修辞使人善辩。
总之，“知识能塑造人的性格”。
不仅如此，精神上的各种缺陷，都可以通过求知来改善——正如身体上的缺陷，可能通过适当的运动来改善一样。
例如打球有利于腰肾，射箭可扩胸利肺，散步则有助于消化，骑术使人反应敏捷，等等。
同样，一个思维不集中的人，他可以研习数学，因为数学稍不仔细就会出错。
人教版九年级化学单元练习题- 第四单元 自然界的水(含答案)
人教版九年级化学单元练习题第四单元自然界的水一、选择题1．以下图标适合张贴在公共水龙头旁的是A．B．C．D．2．2021年世界水日的主题是“珍惜水、爱护水”，下列有关水的说法正确的是A．为了节约用水，可以直接用工业废水灌溉农田B．过滤和加热都可以使硬水软化C．水中的色素和异味可用活性炭吸附D．电解水实验说明水是由氢气和氧气组成的3．我市地表水质居全省第一，但地表水仍需经过净化才能饮用。
自来水厂的净水流程为：取水→沉降→过滤→活性炭吸附→含氯物质消毒杀菌。
其中涉及化学反应的环节是A．取水B．过滤C．活性炭吸附D．含氯物质消毒杀菌4．区分软水和硬水最简单的方法是加入（）A．食盐水B．醋酸C．蔗糖水D．肥皂水5．化学用语是国际通用语言，是学习化学的重要工具。
下列化学用语书写不正确的是A．铁元素：FeB．两个水分子：2H2OC．纯碱：NaOHD．一个臭氧分子由三个氧原子构成：O36．如果用“”表示氧原子，用“”示硫原子，则下列模型可以表示二氧化硫分子（SO2）的是A．B．C．D．7．自来水厂净水过程示意图如下，下列说法正确的是A．明矾是一种常用的絮凝剂B．过滤可除去水中杂质离子C．活性炭可长期使用无需更换D．经该净水过程得到的是纯水8．水是一种宝贵的自然资源，下列有关水的说法正确的是A．水由氢气和氧气组成B．生活中可用煮沸的方法降低水的硬度C．河水经沉淀、过滤、吸附，净化成蒸馏水D．电解水实验中产生O2和H2的体积比为2：19．水是生命之源。
如图为电解水的实验装置，下列说法正确的是A．该实验可用于研究水的组成B．正极所连的电极上产生的是氢气C．b中产生的气体可支持燃烧D．实验过程中漏斗内液面高度不变10．氮化锶（Sr3N2）是生产高端荧光粉的主要原料。
已知Sr3N2中N的化合价为﹣3，则Sr的化合价为A．﹣3 B．﹣2 C．+2 D．+311．关于H2O和H2O2的比较，不正确的是()A．都含有氢、氧元素B．都由氢、氧原子构成，结构相同C．一定条件下都能分解产生氧气D．H2O是常见的溶剂，H2O2溶液可用于医疗消毒12．下列关于有机物的叙述正确的是A．丙烷（C3H8）中碳元素、氧元素的质量比为3：8B．每个聚乙烯[化学式可表示为（C2H4）n]分子中含有2个碳原子、4个氢原子C．因为淀粉和纤维素的化学式都是（C6H10O5）n，所以它们是同一种物质D．甲醛（CH2O）、乙酸（C2H402）、葡萄糖（C6H12O6）中氢元素的质量分数相同13．1909年，德国化学家保罗·弗里德伦德尔在多刺海螺的鳃下腺中提取出了一种紫色染料――泰尔红紫（分子式为C16H8Br2N2O2），这种染料一直被用于为王室及富裕阶级的长袍染色。
2024年人教版九年级上册英语第四单元课后练习题(含答案和概念)
2024年人教版九年级上册英语第四单元课后练习题（含答案和概念）试题部分一、选择题：A. attractB. interestC. involveD. encourageA. attractedB. interestedC. involvedD. encouraged3. Which of the following sentences uses the word "encourage" correctly?A. The teacher encouraged me to finish my homework.B. The teacher encouraged me to go to bed.C. The teacher encouraged me to eat more.D. The teacher encouraged me to watch TV.4. What is the past tense of "attract"?A. attractedB. attractC. attractsD. will attract5. Choose the best translation for "interest" in Chinese.A. 兴趣B. 重要性C. 关系D. 义务6. Which sentence is a correct question using "How"?A. How you like the movie?B. How do you like the movie?C. How you did like the movie?D. How did you like the movie?7. What is the correct form of "There be" sentence?A. There is a book on the table.B. There have a book on the table.C. There has a book on the table.D. There had a book on the table.8. Which word can be used to describe someone who is very interested in sports?A. enthusiasticB. boredC. lazyD. tiredA. interestedB. interestingC. interestD. interests10. Which of the following sentences is NOT a suggestion?A. Let's go to the park this weekend.B. I suggest we go to the park this weekend.C. Why don't we go to the park this weekend?D. I think you should go to the park this weekend.二、判断题：1. The word "attract" and "interest" have the same meaning. ( )2. "Encourage" means to give someone support and confidence. ( )3. The past tense of "encourage" is "encouraged". ( )4. "There is" and "There are" can be used interchangeably. ( )5. "Enthusiastic" is a negative adjective. ( )6. A question using "How" always starts with "How do". ( )7. "There have" is a correct form of "There be" sentence. ( )8. The word "bored" can be used to describe someone who is very interested in something. ( )9. "Interesting" and "interested" can be used interchangeably. ( )10. A suggestion always starts with "I suggest". ( )三、填空题：1. The opposite of "bored" is ________.2. If someone is very interested in a subject, we can say they are ________ about it.3. To ask for permission, we can say "Can I ________ your book?"4. "There ________ a lot of books on the shelf" is a correct sentence.5. The teacher ________ us to participate in the school's sports day.6. If you want to suggest something, you can say "Whydon't we ________?"7. The correct form of "There is" in plural is "There________."8. "I am ________ in learning new languages" is a correct sentence.9. The past tense of "suggest" is ________.10. To make a polite request, we can say "Could youplease ________ me?"12. If something is very attractive, it has a strongpower of ________.13. "She ________ her audience with her speech" means she made them interested.14. To express interest in someone's hob, you can say"I'm ________ in your hob."15. "There ________ many students in the classroom" is a correct sentence.16. The correct form of "There is" for uncountable nounsis "There ________."17. "I ________ you to read this book" means I advise you to read it.18. To describe someone who is not interested in anything, we can use the word ________.19. "The ________ of the movie was so strong thateveryone wanted to watch it."四、简答题：1. Explain the difference between "interested" and "interesting."2. How do you form a question using "How"?3. What is the correct structure of a "There be" sentence?4. Give an example of how to use "encourage" in a sentence.5. What is the past tense of "attract"?6. How do you make a suggestion in English?7. What is the opposite of "encourage"?8. Write a sentence using "There are" with a plural noun.9. Explain how to use "suggest" in a sentence.10. How do you express lack of interest in something in English?一、选择题答案：1. A. attract2. A. attracted3. A. The teacher encouraged me to finish my homework.4. A. attracted5. A. 兴趣6. B. How do you like the movie?7. A. There is a book on the table.8. A. enthusiastic9. A. interested10. B. I suggest we go to the park this weekend.二、判断题答案：1. ×2. √3. √4. ×5. ×6. ×7. ×8. ×9. ×10. ×三、填空题答案：1. interested2. enthusiastic3. borrow4. is5. encouraged6. go7. are8. interested9. suggested10. help11. heart12. attraction13. attracted14. interested15. are16. is17. suggest18. bored19. attraction20. Would四、简答题答案：1. "Interested" is used to describe someone who has a feeling of interest in something, while "interesting" is used to describe something that is likely to interest someone.2. You form a question using "How" starting with "How" followed the subject and verb, for example: "How do you like it?"3. The correct structure of a "There be" sentence is "There" + verb (is/are) + subject + additional information.4. Example: The teacher encouraged us to participate in the school's sports day.5. The past tense of "attract" is "attracted."6. To make a suggestion in English, you can use phrases like "Why don't we," "Let's," or "I suggest that we"7. The opposite of "encourage" is "discourage."8. Example: There are many books on the shelf.9. Example: I suggest we start the meeting on time.10. To express lack of interest, you can say "I'm not interested in" or "I don't have much interest in"Vocabulary: The test covers understanding and using vocabulary related to interest, attraction, and encouragement.Grammar: Questions test knowledge of verb tenses (past tense), sentence structure (There be sentences), and question formation (How questions).Adjectives: The test assesses the use of adjectives like "interested," "interesting," "enthusiastic," and "bored."各题型知识点详解和示例：选择题： Tests the ability to choose the correct word or phrase based on context. It also checks the understanding of vocabulary and grammar rules.Example: "The teacher encouraged me to finish my homework" tests the correct use of the verb "encourage."判断题： Assesses the understanding of grammatical rules and vocabulary usage.Example: "The past tense of 'encourage' is'encouraged'" tests the knowledge of verb conjugation.填空题： Evaluates the ability to use vocabulary and grammar correctly in sentences.Example: "The opposite of 'bored' is ________" teststhe knowledge of antonyms.简答题： Tests the ability to explain grammatical concepts and use them in sentences.Example: Explaining the difference between "interested" and "interesting" requires an understanding of adjectives and their usage.试题部分一、选择题：1. In Unit 4, which word is used to describe a person who is good at cooking?A. ChefB. ArtistC. ScientistD. Athlete2. Which of the following sentences uses the simplefuture tense correctly?A. I will go to the movies last night.B. She will visit her grandparents next week.C. They will goes to the park tomorrow.D. He will eating breakfast in the morning.3. What is the correct form of the word "invite" in the past tense?A. InvitedB. InvitedC. InviteD. InvitingA. WhereB. WhenC. WhyD. How5. Which of the following phrases means "a long time ago"?A. A few days agoB. A week agoC. A month agoD. A long time ago6. In English, which word is used to connect two independent clauses?A. BecauseB. AndC. ButD. Or7. What is the correct form of the word "happy" when describing multiple people?A. HappyB. HappiesC. HappiesD. Happiness8. Which of the following sentences is in the passive voice?A. The teacher taught the students.B. The students were taught the teacher.C. The teacher teaches the students.D. The students teach the teacher.A. DoB. DoesC. DoingD. DidA. UnB. lyC. ReD. ness二、判断题：1. The past tense of "do" is "did". ( )2. "A lot of" and "lots of" can be used interchangeably. ( )3. The simple present tense is used to describe actions that happen regularly. ( )4. "Whose" is a possessive pronoun. ( )6. "They" is a singular pronoun. ( )7. The past participle of "go" is "went". ( )9. "He" and "she" are subjective pronouns. ( )10. "There" and "their" have the same meaning. ( )三、填空题：1. The past tense of "eat" is ________.2. "I am" is the first person singular of the ________ tense.3. The opposite of "expensive" is ________.4. A noun is a word that represents a ________, ________, or ________.5. The plural form of "child" is ________.6. The correct form of "I" in the possessive case is________.7. "She ________ to the store yesterday" is an example of the simple past tense.8. The contraction for "they are" is ________.10. The prefix "un" means ________.11. "Read" and "write" are examples of ________ verbs.12. "I have two ________ and three ________" shows the use of plural nouns.13. The word "________" is used to connect two independent clauses.14. "________" is the question word used to ask for the reason.15. "________" is the past participle form of "do".16. "I am ________ to see you" is a positive sentence using an adjective.17. The opposite of "hot" is ________.18. "________" is the correct form of "be" in the present tense for "he".19. "I ________ a book" is the correct form to express possession.20. "________" is the correct form of "we" in the objective case.四、简答题：1. What is the difference between "its" and "it's"?2. Explain the difference between a regular and an irregular verb.5. What is a preposition and give three examples.6. Describe how to use the simple future tense correctly.7. What is the difference between "affect" and "effect"?8. How do you identify the subject and predicate in a sentence?9. What is an adverb and how does it differ from an adjective?10. Explain the concept of subjectverb agreement.一、选择题答案：1. A2. B3. A4. A5. D6. B7. C8. B9. A10. A二、判断题答案：1. √2. √3. √4. √5. √6. ×7. ×8. √9. √10. ×三、填空题答案：1. ate2. present3. cheap4. person, place, thing5. children6. mine7. went8. they're9. go10. not11. transitive12. cats, dogs13. and14. why15. done16. happy17. cold18. is19. have20. us四、简答题答案：1. "Its" is a possessive pronoun showing ownership, while "it's" is a contraction of "it is" or "it has".2. Regular verbs form their past tense and pastparticiple adding ed to the base form, while irregular verbs change their form in various ways.3. Commas are used to separate elements in a list, to set off nonrestrictive clauses, and to separate coordinate adjectives.4. Comparative is formed adding er or using "more" before the adjective, and superlative is formed adding est or using "most" before the adjective.5. A preposition shows the relationship between a noun or pronoun and other words in the sentence. Examples: in, on, under.6. The simple future tense is formed with will/shall + base verb and is used to talk about future actions or intentions.8. The subject is the person or thing that performs the action, and the predicate is the part of the sentence that tells what the subject does or is.9. An adverb modifies a verb, adjective, or other adverb and often ends in ly. It differs from an adjective, which modifies a noun.10. Subjectverb agreement means that the subject and verb must agree in number and person.Vocabulary: Nouns (plural forms), verbs (regular and irregular), adjectives (opposites), and prefixes.Syntax: Sentence structure (subject, predicate), clause types (independent, dependent), and question formation.各题型知识点详解和示例：选择题： Assess understanding of vocabulary, grammar rules, and sentence structure. Example: Identifying the correct tense usage.判断题： Evaluate knowledge of grammar rules and vocabulary usage. Example: Recognizing possessive pronouns.填空题： Test ability to apply grammar rules and vocabulary knowledge. Example: Filling in the correct past tense form of a verb.简答题： Measure the ability to explain and understand grammatical concepts. Example: Explaining the difference between adjectives and adverbs.。
人教版九年级英语全册Unit 4 单元测试含答案
九年级英语Unit 4 I used to be afraid of the dark.单元测试一、单选题( )1．----There ______ a number of workers in the factory.----Yes. The number of women workers ______ 500.A．is, is B．are, is C．is,are D．are. are( )2．----James, can you tell me ______ ?----Paul ? I haven’t seen him for years. He used to be a shy boy.A．what is Paul like B．what Paul is like C．what does Paul like D．what Paul likes ( )3．We should learn how to ______ the relationship with our teachers and classmates.A．do with B．deal with C．give up D．give away ( )4．Mr. Wang used to ______ dinner outside, but now he is used to __meals with his family at home.A．have, eat B．have, eating C．having, eat D．having, eating ( )5．I ______ an English test yesterday. But I was not lucky and ______ the test.A．did, failed B．failed, passed C．took, failed D．passed, failed ( )6.—Have you ever read the traditional story YuGongMovesaMountain?—Yes.Our teacher often advises us ________ more meaningful traditional books.A．reading B．reads C．to read D．read( )7.Dale used to ______to office in his car，but he is used to ______the bus now.A．going；taking B．going；takeC．go；taking D.go take( )8. Great changes have taken place in Xiangyang.We are all ________ the achievements.A．known as B．proud ofC．similar to D．pride in( )9.Uncle Liang________eats out because his wife always makes delicious food for him.A．seldom B．sometimesA．such；that B．too；toC．so；that D．not；until)13.The best way of solving the problem is by asking the teacher for help.A.dealing withB.agreeing withC.looking upD.giving up)14.John used to be the last to leave school last month.A.was used toB.was oftenC.was usedD.got used to)15.The little girl has to take care of her grandmother and grandfather when her parents are out.二、完型填空Everyone changes in his or her life.Mostly these changes take place because of an experience. 21 me,high school was such an experience.High school has taught me about myself,and that is the most 22 lesson I have ever learned.I used to be quiet and 23 ,not wanting to show my inner self(内在自我).I would never talk aboutwas on my mind.I was afraid that someone would criticize(批评)me or tell me I was wrong.I cared too much about what others thought of me.Now I am no longer afraid to tell others my worries and let them know how I feel.I have changed a lot with the of my teachers and friends.They taught me that it is not a big deal to 26 in something as long as I have learned from my mistakes.By finding the courage(勇气)to believe in 27 ,I have become much 28 in mind.The thought of a challenge used to make me feel afraid, 29 now I want to work even harder to 30 the difficultiesASome people have a very poor sense of direction．Unluckily，I am one of them．I have visited a place many times but I may still get lost there the next time．When I was a little girl，I never dared to ask strangers the way．And so I used to walk round in circle and hope that by chance I would get to the place I was going to．Now，I am no longer too shy to ask people for directions，but I often receive helpless or even wrong information．So I try to avoid giving people wrong directions．If anyone asks me the way somewhere，I would "sorry，I am a stranger here．"Once on my way to work，I was stopped by a man．He asked me if I could tell him the way to the Friendship Building．I gave him my usual reply．But just as I walked on only a few steps，I realized that he had asked the way to my office building．However，I had no time to turn back and look for him．I was rushing to meet with someone at my office and I didn't want to keep him waiting．B．The writer has a very poor sense of direction．C．The writer never got lost when she was young．D．The man was quite nervous when he saw the writer．BTen-year-old Johnny was one of the laziest boys in his class.He could never finish his homework on time.And there always were many mistakes in homework.One day his class went on a bus trip.The teacher didn't want to take Johnny with them.But there was no one to look after Johnny at the school，so she had to take him.“Now，children，”the teacher said.“On our bus trip we can see old buildings，some beautiful countryside many other things.I want you to write about everything you see on the trip.”The bus trip began.The children looked out of the windows at all the interesting things.They recorded notes in )3 9.What kind of person is Johnny?A．Hard-working.B．Lazy.C．Smart. D．Cute. )4 0.In this story，the word“recorded”means“ ____”．A．read B．spoke C．listened D．wrote C I know my brother better than anyone else in the world.Since the moment of his birth,I’ve been part of his life.Ispent seven happy years in the world with the attention of those around me.But when Rohan was born,life changed.All of a sudden,I had to share my toys and there were no more bedtime stories or my own choice of food.Finally,I hated this small boy.The poor baby had no idea what had made me so unhappy.Maybe he found strange,the only person in this house who did not like him.Whatever the reason was,he loved followingC.often talked to the babyD.never talked to the baby)43.The underlined phrase “that one moment” refers to the time .A.when there were no more bedtime stories for the sisterB.when the sister found herself in her brother’s room C.when Rohan softly touched his sister’s handD. when Rohan found herself in her brother’s room( )44.Which of the following is TRUE?A.The sister doesn’t know her brother very well.I passed the exam of history but f________ the exam of chemistry.Ann is a_______ today and Jack will give us the lesson instead of her.The g________ opinion is that the meeting was a success.Tomorrow we will have a Chinese e_______．Everyone works hard in the classroom.五、词汇运用用括号中所给单词的适当形式填空。
人教版九年级英语第四单元综合练习题(含答案解析)
人教版九年级英语第四单元综合练习题（含答案解析）Ⅰ. 单项选择1.—What's the matter with you? Why do you keep ________ for long?—I feel sick and don't want to say anything.A.healthyB. warmC. silentD. bored2. You needn't do all the housework ________. You can let your families help you.A. in personB. for yourselfC. at leastD. for example3. My parents ________ go to visit my grandparents these days because they are too busy, so they feel very sorry.A. usuallyB. alwaysC. all the timeD. seldom4. Our teachers often require us ________ for our dreams.A. studyB. studyingC. studiedD. to study5. My classmate Li Jun saved a kid who feel into a river last Saturday. We ________ him.A. take pride ofB. take pride inC. be proud inD. be pride in6. My son ________ lazy, but he has been hard-working since he became a middle school student.A. used beB. use to beC. used to beD. is used to be7.You can talk about it with your father. He knows how to ________ all kinds of problems.A. give upB. make upC. agree withD. deal with8. Could you please ________ my baby while I'm cooking?A. take out ofB. take care ofC. take part inD. take away from9.—________ you ________ go to school by bike?—Yes. But now I usually go to school by bus.A. Did; use toB. Were; used toC. Do; use toD. Will; use to10. It ________ two months since I ________ my hometown.A. was; leaveB. was; leftC. has been; leaveD. has been; leftⅡ. 完形填空Last Friday, I met an old friend of mine in the supermarket. We haven't seen each other __1__ three years ago. She has __2__ a lot. She __3__ very fat and always __4__ a pair of glasses. But now, she is very thin and the glasses are gone. She __5__ so beautiful with big eyes and long blond hair—it used to be short and brown. She used to be very silent and was __6__ of speaking in public. Now she is humorous and she told me she was __7__ her school volleyball team and played __8__ piano. She said she hoped I could go to see her performance __9__. She looks so confident and I know she isn't what she used to be __10__.1.A. in B. for C. since D. with2. A. changed B. been changed C. turned D. become3. A. used to B. was used to be C. used to be D. was used to being4.A. wear B. wore C. put on D. dressed5. A. sounds B. was like C. looks D. looked6.A. afraid B. fond C. ready D. dare7. A. with B. for C. at D. on8. A. the B. a C. / D. some9. A. every day B. sometimes C. some day D. some time10. A. no more B. no longer C. not anymore D. anymoreⅢ. 阅读理解Chen Yujie, 15, studies at a boarding school in Ningbo, Zhejiang. __1__ It was not a short ride home and the trips were tiring. Chen hoped her parents could put the money on a bank card, so she didn't have to travel so often.__2__ “It's usually the most relaxing time for our family，”said Chen.She chose the right time. After a few turns of lobbying(游说), her parents finally agreed with Chen. __3__ So they have to choose a right time.US magazine Highights recently surveyed 1,521 kids aged 6－12 in the country, asking questions like “__4__ ”Results show that American kids seem to know when their parents are most receptive(乐于接受的). Meal time is discovered to be their most favorite time to talk to their parents. Bed time comes second, followed by time spent in the car.Chinese teenagers seem to have a similar tendency(倾向) over the problem. Qianjiang Daily, a newspaper in Zhejiang, did a survey about it. __5__ So do you have anything to talk to your parents about? Choose a good time.根据短文内容，从方框中选出五个句子填入文中空缺处，使短文内容完整正确。
人教版九年级英语Unit4单元测试题及答案
人教版九年级英语Unit4单元测试题及答案Unit4I used to be afraid of the dark.单元测试02一、听力理解（20小题，每小题1分，共20分）第一节听下面5段对话。
每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳答案。
每段对话读两遍。
1.How did Bob use to go to school?A.Walk.B.Ride a bike.C.Take a bus.2.Who is looking for the dictionary?A.Jack.B.Tom.C.Mary.3.What are the two speakers talking about?A.The weather.B.A radio.C.The time.4.What is Tom’s sister like?A.She is shy.B.She seldom talks in public.C.She is popular with her classmates.5.Who is the girl in a black coat?A.Jane.B.The man’s sister.C.The woman’s sister.第二节听下面几段对话或独白。
每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳答案。
每段对话或独白读两遍。
听下面一段对话，回答第6至第7两个小题。
6.What was the girl like in the past?A.Outgoing.B.Shy.C.Serious.7.What does the boy like doing?A.Painting.B.Playing the piano.C.Playing the guitar.听下面一段对话，回答第8至第9两个小题。
8.Did the man do well in his subjects at school?A.Yes,he did.B.No,he didn’t.C.We don’t know.9.What does the man do?A.He is a singer.B.He is a teacher.C.He is a football player.听下面一段独白，回答第10至第12三个小题。
人教版九年级英语全册 Unit 4 综合测试题(含答案)
人教版九年级英语全册 Unit 4 综合测试题（含答案）一、单项选择1．—Mr. Zhang, I can’t understand anything in class.—Don’t worry! We’ll ________ the key points at the end of class.A．review B．record C．remember D．require2．In the past, people used to ________ in cash (现金), but now people get used to ________ with WeChat.A．pay; pay B．paying; paying C．pay; paying D．paying; pay 3．—Why do you always look so tired?—I have to study all the time because my parents give me a lot of ________ about school.A．shyness B．pressure C．risks D．fairness 4．China’s efforts to stop the spread of COVID-19 will ________ the world’s ability to limit the harm in the near future.A．interview B．improve C．invite D．invent 5．—What do you think of the prices now?—As a ________ rule, they follow needs.A．strict B．general C．absent D．simple6．It’s ________ to know the weather about the place of interest on the Internet before you travel there.A．creative B．organized C．helpful D．curious7．Mike got up late this morning. ________, he didn’t miss the early bus.A．Finally B．Exactly C．Suddenly D．Luckily8．It’s helpful to talk with your friends ________if you can’t get on well with them.A．in public B．in style C．in common D．in person9．— How does Tom go to the office?— He __________ drive a car, but now he __________ there to keep healthy.A．used to; is used to walk B．was used to; is used to walkingC．was used to; is used to walk D．used to; is used to walking10．Do you know what is used _________ the beautiful art works？A．to making B．for making C．make D．makingA．correct B．boringC．humorous D．direct12．—Why could you write so well?—I read a lot, and the works of Ernest Hemingway had a strong ________ on me as a child.A．attention B．explanation C．situation D．influence 13．Jack’s mother prepares breakfast for him almost every day, so he ________ eats out.A．sometimes B．usually C．seldom D．often14．—Is Sun fit for this kind of job?—Wait a minute! I’ll tell you ________ what I think of him when I finish my work.A．exactly B．early C．suddenly D．angrily15．— Mr. Green ________ his son.— Yes. He likes talking about his son with any friend of his.A．takes care of B．takes up C．takes pride in D．takes after二、完形填空We are now in the 22nd century. With the development of science and technology. People canbecause she could not hear (忍受) the bad smell of his old feet.16．A．in B．by C．on D．of 17．A．cared for B．waited for C．asked for D．sent for 18．A．popular B．similar C．strange D．useful 19．A．long B．short C．thick D．thin 20．A．silently B．foolishly C．carelessly D．suddenly 21．A．shape B．age C．life D．look 22．A．probably B．hardly C．nearly D．completely 23．A．Because B．But C．However D．Although 24．A．guided B．refused C．forced D．allowed 25．A．interest B．condition C．decision D．situation三、阅读单选My grandfather is an eighty-year-old man. He changed, and he often says that life used to be better.Families aren’t families the way they used to be. A lot of families have broke down. If husband and wife have problems with their marriage, they no longer stay together. And mothers used to stay at home and take care of their children, but now everyone’s working. No one has time to look after children at home.And the cars! No one walks any more: everyone drives. We used to walk five miles to school every day, even in winter. But now they don’t. And in schoo1, the children don’t have to think any more. In math class, for example, we used to add, subtract, multiply and divide in our heads. Kids don’t use their heads any more；instead, they use calculators(计算器).Most families have computers now. In the past we didn’t have computers.We didn’t even have lights. My mother used to spend all day cooking in the kitchen. But now nobody eats home-cooked food any more.And people don’t talk to each other any more. They are too busy to talk, too busy to eat, too, busy to think……Life used to be simple, but it isn’t any more.26．My grandfather thinks the life ________.A．is better than it used to be B．is worse than it used to be C．is as good as itused to be D．is as bad as it used to be27．What does the underlined word “marriage” mean in Chinese?A．生活B．工作C．婚姻D．家庭28．What changes have happened to some families?①There are lights at home.①People like to eat home.cooked food.①Lots of families have computers.①Lots of couples live apart because of some prob1ems.A．①①①B．①①①C．①①①D．①①①29．Which is TRUE according to the passage?A．People have too much time to talk with each other.B．Life now is very simple.C．Many families have broken down because of problems between husbands and wives.D．Mothers stay at home and look after their children.30．.Which is the best title for this passage?A．How life used to be B．The better life C．The changes in our life D．Hard-working studentsI asked three of my friends how they had changed since they came to our middle school. And here are their answers.RobinI didn’t do well in my study before, but since I began to study in this school, things have changed. The teachers here are all energetic, active and helpful. They always encourage me by saying “I’m sure you can make it” or “You are one of the cleverest students I have ever met”. These words really mean a lot to me. Now I’m one of the top students in my class, and I like studying as well.DickI used to be a fat boy who could hardly run 500 meters. When I entered the middle school, my father worried that I would be laughed at by my new classmates, so he decided to do morning exercises with me every day. It really worked. Now I’m used to running and exercising in themorning, and I am slim and strong. Besides, my P. E. teacher thinks I can be a good runner in the future!JasonI used to like to be alone and didn’t fee like talking to anyone. But when I met Robin and Dick, I found that they were really good people. Then gradually we became closer and finally became good friends. Thanks to them, I’m talkative and outgoing now, and I have made many other friends. I talk and play with my friends every day and each day I feel happy.31．Who always encourages Robin after he came to the middle school?A．His teachers.B．His friends.C．His parents.D．His classmates.32．Why did Dick’s father do exercise with him?A．Because he wanted to lose weight.B．Because he wanted his son to be healthy.C．Because he loved doing sports.D．Because he worried that his son would be laughed at school.33．Thanks to ________, Jason is an outgoing boy now.A．Dick and Tim B．Robin and TimC．Dick and Tom D．Dick and Robin34．The underlined word “talkative” means “________” in Chinese.A．活跃的B．兴奋的C．健谈的D．沉默的35．Which of the following is TRUE according to the passage?A．Robin thinks the teachers in the middle school are humorous.B．Dick runs every morning and he is strong.C．Jason isn’t outgoing and he doesn’t make friends with anyone.D．Robin doesn’t study hard and he is a bad student in his class.As a student, I was most afraid to answer questions in class, and I found that the students around were just like me. At the beginning of each class, when the teacher asked a question, I always lowered my head because I was afraid that the teacher saw me. One day, in a foreign language class, Mr. Black gave us a lesson. He wanted us to be active in class, so he asked ussome questions, but no one answered. “Let me tell you a story first,” he said. “When I came to the United States to study, the university often invited famous people to make speeches. Before the beginning of every speech, I found an interesting thing. The students around me always took aand then placed the cardboard on the seat. So when the speaker needed the answers from the students, he could see and call a listener’s name directly.”“I couldn’t understand that. My classmate told me the speakers were all top people who meant chances. When your answer was to his surprise, it meant he might give you more chances. In fact, I really saw a few students got great chances because of that.”After listening to the story, I understood that the chance would not find you itself. You must show yourself all the time so that you could find a chance on the card.36．What did Mr. Black want the students to do in his class?A．Read loudly.B．Take notes carefully.C．Be active.D．Listen to him quietly.37．How did the writer’s classmates behave when they were asked questions?A．They raised their hands.B．They shook their heads.C．They closed their eyes.D．They lowered their heads.38．How did the speaker get to know the students’ names?A．He got them from the computer.B．He saw the cardboards on the seats.C．He asked the students for their names.D．He got them from the name list on theteacher’s desk.39．What does the underlined word “eye-catching” in Paragraph 1 mean in Chinese?A．引人注目的B．眼睛疼痛的C．目光呆滞的D．睡眼朦胧的40．What does the writer mainly tell us?A．Doing as others do is necessary.B．Answering questions bravely is easy.C．Attracting others’ attention is interesting.D．Showing yourself bravely can win chances.四、阅读回答问题In American countryside, people often park their cars in the yard when they are at home. Soyou can easily understand whether people are at home or not. But I used to park my car in the car barn (车库) when I was on holiday.It was a Sunday morning. I got up early and went to the garden behind our house with my husband. We planted some flowers and trees there. About one hours later, I heard our lazy dog yipping (犬吠) in our house. I at once realized that something must be happening in the house. Quickly, my husband and I came back to the house and saw a boy rush out of our house and run away.“Come in and see what was gone.” My husband said. “He must think nobody is in.”“Shall I go to run after him or call the police?” my husband asked.“No, after all, we have nothing lost.” I replied.Some days later, a woman with the boy came to my house and asked, “Is it your dog? I found that it killed my chicken yesterday, and I wanted to kill it. But my son said it was yours.”When I was shaking hands with the boy to thank him. I felt something hard in my hand. I wanted to say something, but he has run away again.根据短文内容，回答下面问题。
4人教版九年级英语上册第4单元Unit4作业练习题(含答案解析)
Unit 4 Section A 1a-2d（总分：40分时间：30分钟）I. 单项选择（本题包括8小题，每题2.5分，共20分）1. Peter used to ________ the guitar, but now h e is more ________ in playing soccer.A. plays; interestedB. play; interestedC. playing; interestingD. play; interesting2. Now Li Hu a is ________ the volleyball team.A. onB. inC. atD. of3. Mr. Liu has taught us English ________ he came to our school.A. untilB. becauseC. thoughD. since4. When I walked past the park, I saw some old people _________ Chinese Taiji.A. doB. didC. doingD. are doing5. The girl is afraid _________ the spiders because they look scary.A. forB. ofC. withD. about6. This party is _________ great idea! Everyone will have a good time.A. suchB. such aC. so aD. so7. — Look at the se stamps. I ________ them for five years.— Wow, they are wonderful.A. keptB. keepC. have kept `D. have keep8. Your sister used to be short, _________ she?A. isn’tB. wasn’tC. didn’tD. doesn’tⅡ. 用括号内所给单词的适当形式填空（本题包括10小题，每题2分，共20分）1. Paul was brave enough ____________ (ask) questions.2. Tom is very ___________ (help), he always helps the people who need help.3. Mary is very quiet, and she’s always ___________ (silence) in class.4. I’m afraid of ____________ (be) outside alone at night.5. My English teacher is ___________ (friend) to us and we all like her very much.6. She worked hard and ____________ (get) good grades.7. His friend is interested in ___________ (play) basketball.8. I used to see him ______________ (read) in the library.9. He used to ___________ (wear) glasses.10. It ___________ (be) five years since we last saw each other.Unit 4 Section A 1a-2d 参考答案：I. 1-5 BADCB 6-8 BCCII. 1. to ask 2. helpful 3. silent 4. being 5. friendly6. got7. playing8. reading9. wear 10. has beenUnit 4 Section A 3a-3c（总分：50分时间：30分钟）I. 单项选择（本题包括5小题，每题4分，共20分）1. —What are you going to do during the summer vacation?—I am going to ___________ a new hobby like swimming or dancing.A. take offB. take upC. take afterD. take in2. —The meat is ___________ delicious. —Yes. But don’t eat ____________.A. too much; much tooB. much too; too muchC. too many; too muchD. too much; too much3. My pen pal John is an _____________ boy from America.A. eleven year oldB. eleven years oldC. eleven-year-oldD. eleven-years-old4. Good news for all Chinese middle schools in the countryside. They didn’t have to pay for school ___________.A. no moreB. no longerC. any moreD. not any longer5. The number of the students in our class _______ 56. A number of them _______ from the city.A. is; areB. are; isC. is; isD. are; areⅡ. 用括号内所给单词的适当形式填空（本题包括8小题，每题2.5分，共20分）1. He used to _____________ (swi m) in the river.2. He didn’t what ____________ (do) next.3. At last he gave up ____________(write).4. He always dares ____________ (give) a speech in front of the class.5. ____________ (hang) out with parents is very good for our development.6. Do you want _____________ (become) famous when you grow up?7. Linda is able _____________ (speak) two languages.8. You may take up ____________ (dance) to deal with your shyness.Ⅲ. 用方框内所给单词的适当形式填空（本题包括5小题，每题2分，共10分）1. Can Helen deal with her _______________ well? She is too shy.2. Jane is an _______________ girl. But she is studying in Asia now.3. There is no time left. We have to ______________ the hard work.4. Yesterday I _______________ the famous actor and h ad a good talk with him.5. Confidence (自信) in you is the first step on the road to _______________.Unit 4 Section A 3a-3c参考答案：I. 1-5 BBCCAII. 1. swim 2. to do 3. writing 4. to give5. Hanging6. to become7. to speak8. dancingIII. 1. shyness 2. African 3. give up 4. interviewed 5. successUnit 4 Section A Grammar Focus-4c（总分：90分时间：40分钟）I. 单项选择（本题包括6小题，每题4分，共24分）1. — How does Jack usually go to work?—He ____________ drive a car, but now he ___________ t here to lose weight.A. used to; is used to walkB. was used to; is used to walkingC. was used to; is used to walkD. used to; is used to walking2. In English class we are used to ____________ in groups.A. workB. to workC. workingD. works3. Your father used to eat meat, _____________?A. did youB. didn’t youC. didn’t heD. did he4.— ____________ Mik e _____________ wear a pair of glasses?— Yes, he did. He has been short-sighted for many years.A. Is; used toB. Is; usedC. Did; use toD. Did; used5. The Greens used to live in London and now they ____________ in Beijing.A. used to liveB. are used to livingC. are used to liveD. are used for living6. It is impolite to smoke _____________.A. in publicB. in dangerC. in silenceD. in surpriseⅡ. 用括号内所给单词的适当形式填空（本题包括13小题，每题1分，共13分）1. The people here are _________ (friend) to us.2. The girl who will perform at the party tomorrow come from a _________ (Europe) country.3. China is an _________ (Asia) country.4. Jane is an ________ (Africa) girl. But she is studying in Asia now.5. Confidence is the first step on the road to __________ (succeed).6. We are going to give a __________ (speak) at the meeting this afternoon.7. Can He len deal with her __________ (shy) well? She is too shy.8. In order to get good grades, we must be __________ (care) in the exams.9. I used to be afraid of __________ (be) alone.10. Jack used to ___________ (play) basketball, but now he likes playing soccer.11. The reporter is ___________ (interview) our headmaster.12. The old man is used to _________ (live) in the countryside.13. As she got better, she __________ (dare) to sing in front of her class.Ⅲ. 根据汉语意思完成句子，每空一词（本题包括8小题，每空1分，共23分）1. 这里有时下雨。
最新人教版九年级英语全册Unit4单元标准测试题及答案解析(精品试卷)
Unit 4标准检测卷(满分：120分时间：100分钟)题号一二三四五六七八九十总分得分听力部分(20分)一、听句子，选出与所听句子内容相符的图片(每小题1分，共5分)A B CD E________(1)________(2)________(3)________(4)________(5)二、听小对话，选择正确的答案(每小题1分，共5分)6．What did the boy's mother use to be like?A．She was thin. B．She was tall.C．She had long hair.7．What did Bill use to look like?A．He was fat. B．He used to be short.C．He wasn't short.8．Is the boy still afraid of snakes?A．Yes, he is. B．Yes, he did.C．No, he isn't. 9．What team did Steve use to be on?A．The swimming team. B．The soccer team.C．The tennis team.10．How did Bob use to go to school?A．Walk. B．Ride a bike. C．Take a bus.三、听长对话，选择正确的答案(每小题1分，共5分)听第一段对话，回答第11～12小题。
11．What color is Tina's hair now?A．Black. B．Red. C．Yellow. 12．What did Bob use to be like?A．Thin. B．Strong. C．Fat.听第二段对话，回答第13～15小题。
13．How long haven't they seen each other?A．For 2 years. B．For 4 years.C．Since 2 weeks ago.14．What did the man use to wear?A．Suits. B．Tshirts.C．Jeans.15．Where does the man work now?A．In a school. B．In a bank.C．In a company.四、听短文，回答问题(每小题1分，共5分)16．How many students were there in the speaker's class?A．50. B．55. C．65.17．What did Lily use to be like?A．Outgoing. B．Honest. C．Shy.18．What color is Alfred's hair now?A．Red. B．Colorful. C．Black.19．What did the speaker use to do after school?A．He used to draw pictures.B．He used to play basketball.C．He used to play volleyball.20．How often does the speaker play football?A．Twice a month. B．Twice a week.C．Once a month.笔试部分(100分)五、单项选择(每小题1分，共15分)21．His mother ________ quarrel with his father，but nowthey get along well with each other because of him.A．was used to B．used toC．got used to D．was used for22．What I experienced in the poor mountain villages ______ my life and decision about future.A．caused B．influencedC．appeared D．fought23．Mr Green used to live in Beijing with his daughter, ________？A．did he B．didn't heC．did she D．didn't she24. I saw some boy students ________ basketball whenI passed the playground.A．played B．plays C．playing D．to play 25．—Has Mike received his mother's mail?—Yes, he signed for it ________ this morning.A．in person B．in fact C．in silence 26．—Peter, you got to school by taxi?—Oh, I ________ take a taxi to school, but my bike needs repairing today.A．usually B．sometimesC．never D．seldom27．—Do you still remember that accident, Dean?—Of course. I never forget it ________ it happened many years ago.A．unless B．ever sinceC．only when D．even though28．The girl has walked to school since she was 7 years old. Now she ________ going to school on foot.A．used to B．was used toC．is used to D．is used for29．My friend Lily is such a ________ girl that everyone in our class likes her very much.A．proud B．nervousC．absent D．humorous30．—________ my surprise, Jin Ming was chosen into our school football team.—Congratulations. He did well ________ playing football when he was very young. I hope he'll be thebest player in our school.A．To; of B．At; atC．To; in D．In; about31．We advise parents ________ their children at home alone in order to keep them away from danger.A．not leave B．not to leaveC．leave D．to leave32．Jenny's uncle is a scientist. She is proud ________ him.A．from B．at C．in D．of33．—________ you ________ take a bus to school?—Yes. But now I usually go to school on foot.A．Did；use to B．Do；used toC．Do；use to D．Did；used to34．As a reporter, I want to ________ Ma Yun about how to become the richest man in China.A．require B．repeat C．admire D．interview 35．—Li Ming won first prize in this chess competition.—Really? His parents must ________ him.A．look after B．wake upC．be angry with D．take pride in六、完形填空(每小题1.5分，共15分)(词数：约220；建议用时：7分钟)A teacher had been made very angry by some of hisboys making a high sound during school hours. At last he was forced to ________(36) any one who should repeat the wrong act. The next morning, a loud sound was heard inthe quiet room. The students were very much surprised, and the teacher at once looked around to ________(37) the person who had made a high sound.When a boy who was often in bad act, was told he was wrong, he ________(38) said he hadn't done it, yet his words were not believed, and he was brought up for punishment. Seeing what was about to take place, Charles, a little boy, got up suddenly from his ________(39). “Don't punish John, sir. I made the high sound. I'm very sorry. I didn't mean to whistle.” He held out his hand to be punished. Taking the little boy's ________(40), the teac her said, “Charles, you have done right. I can't punish you after you ________(41)so nobly.” Even the youngest child in the school felt ________(42)of Charles, for every child could see how bravely he had acted.Charles was truly a brave boy. He had done ________(43)he knew to be right. True courage may also be shown by ________(44) to do that which we know to be wrong, ________(45)bad people may laugh at us.36．A.punish B．praise C．fix D．hurt37．A.hide B．discover C．pay D．wake38．A.actively B．aloudC．strongly D．softly39．A.bag B．board C．desk D．seat40．A.hair B．arm C．finger D．hand41．A.have given B．have runC．have acted D．have fallen42．A.afraid B．proud C．sure D．careful 43．A.what B．which C．who D．when44．A.refusing B．continuingC．dreaming D．wanting45．A.but B．though C．after D．until七、阅读理解(每小题2分，共30分)A (词数：约380；建议用时：8分钟)Decide to Do WellEverybody makes decisions in daily life.They can be as important as what you will do in the future or as simple as what you will eat for breakfast.Any decision could be the turning point of your life.I made an important decision when I was in Junior 3.Before I made that decision I was one of the boys who tried too hard to act as an adult.I didn't know that only kids want to show themselves as adults.I didn't listen to my parents and teachers，and mygrades became poor.Then came the high school entrance exam.At the turning point of my life，my mom wanted to have a conversation with me.I wanted to turn it down but when I looked at her eyes，I felt I couldn't refuse.Instead of asking me to study hard，to my surprise，Mom just asked what I wanted to do in the future.Without thinking too much，I just said I would like to study hard.Mom smiled and asked again：“I asked: what do you WANT to do？”I never seriously thought about the question.So，I kept silent.“Whether you want to go on studying or enter the society，”she went on，“it is your own decision.Your life ought to be decided by you，not by anyone else，including me.”After saying that，she had tears in her eyes.For the first time in my life I was asked to make my own decision.I sat in my chair and thought about myself，my life and what kind of person I wanted to become.It took me what seemed to be ages to make the biggest decision so far in my life—I wanted to be a manwho makes a difference in the world.To achieve that，I needed to study hard.The path to my future became clear to me.I didn't act rebelliously(叛逆地) any more.With passion (激情) in my heart，I studied hard.Now，I'm 17 and I'm in one of the best schools in my city，in one of the best classes at the school and I am one of the best students in the class.Thanks to that decision，I have become what I am today.46．When did the writer make the important decision?A．After he was 17 years old.B．After he was in one of the best classes.C．When he was a pupil.D．When he was studying in Junior 3.47．What was the writer like before the decision?A．His grades became poor.B．He tried too hard not to act as an adult.C．He was one of the top students in his class.D．He did what his teachers and his parents asked him to do.48．How did the writer make the decision?A．It was easy for him to make the decision.B．It was his second time to make the decision.C．He made the decision seriously.D．It was his mother that made the decision for him. 49．Why did the writer make the decision?A．Because his teacher talked with him patiently.B．Because he didn't want to act rebelliously any more.C．Because his mother asked him to study hard as usual.D．Because his father asked him to think about his future by himself.50．Which of the following is TRUE?A．The writer made the decision that he should work hard.B．It took the writer several years to make the decision.C．After hearing his mother's words，the writer had tears in his eyes.D．At the turning point of his life，the writer wanted to have a conversation with his mother.B (词数：约170；建议用时：5分钟)An eightyyearold couple were having trouble with their memories. One day, they decided to see a doctor. The doctor told them that there was nothing serious, but he suggested that they should start writing things down to help them remember things. The couple thanked the doctor and left.Later that night while watching TV, the old man got up from his chair and his wife asked, “Where are you going？”“To the kitchen.”“Will you get me an ice cream？” asked the wife.“Sure.”Then his wife asked him to write it down.“No, I can remember that，” replied the husband.“Well, I also want some strawberries and cream on top. You'd better write it down, or you will forget that，” said the wife.“No, I can remember that，” the husband got a little unhappy and went into the kitchen.After about 20 minutes, the husband returned with a plate of fish. The wife laughed, “Haha! Your bad memory!I wanted some bread with cream.”51．How old was the wife?A．Eight. B．Eighteen.C．Eighty. D．Eighties.52．Why did the couple go to the doctor's?A．Because they had a headache.B．Because they had bad memories.C．Because the doctor was their son.D．Because the old man was ill.53．What did the husband give to the wife?A．An ice cream.B．Some strawberries and cream.C．Some bread with cream.D．Some fish.54．What did the wife really want?A．Some bread with cream.B．An ice cream with some strawberries and cream.C．A plate of fish.D．Some strawberries and cream.55．Which sentence is right?A．The couple often forgot some things.B．Only the husband had a bad memory.C．The couple were ill.D．The doctor also had a bad memory.C (词数：约280；建议用时：8分钟)There is little rain in deserts. Because deserts are so dry, they have no “quilt” to help stop the soil from going away. As a result, they may get very hot during the day with the sun shining, but don't hold the heat overnight. Many deserts can quickly get cold once the sun goes down. Some deserts can reach temperatures of over 100 degrees F during the day and then drop below freezing (32 degrees F) during the night.The largest hot and dry desert in the world is the Sahara Desert in Northern Africa. The Sahara is a sandy desert with great sand hills. It covers over 3 million square miles of Africa. Other large deserts include the Arabian Desert in the Middle East, the Gobi Desert in Northern China and Mongolia, and the Kalahari Desert in Africa.Animals that live in the desert are also used to needing little water. Many get all the water they need from the food they eat. Other animals keep water that they can use later. The camel stores up fat in its hump while other animals keep something they need in theirtails.Only certain types of plants can live in the terrible environment of the desert. You won't see a lot of tall trees in the desert. Most plants have a way to keep water in their leaves or trunks so they can live a long time without water.Now deserts cover around 20% of the world's land, but they are growing. This is called desertification and is caused by different reasons including human activities.The Sahara Desert is growing larger and larger each year.What should we do with it?56．How is the weather during the night in the desert?A．Hot. B．Cold. C．Cool.57．Where does the camel store up fat?A．In its hump. B．In its stomach.C．In its tail.58．Why won't we see a lot of tall trees in the desert?A．Because of few people there.B．Because of the sun shining.C．Because of the terrible environment.59．How much of the land do deserts cover in the world?A．One fifth. B．Less than 10%.C．Two fifths.60．Is the Sahara Desert growing or not?A．Nobody knows it. B．It's growing.C．It's not growing.八、词汇运用(每小题1分，共10分)(一)根据汉语提示完成句子。
2022年人教版九年级英语全册Unit4同步练习(含答案解析)
Unit4 I used to be afraid of the dark一、单项选择（共20小题；共20分）1. My grandma in the country. Now she in the city.A. used to live; livesB. used to living; livedC. uses to live; is livingD. was used to live; lives2. --- your father take you to concerts?--- Yes, he did.A. Did; used toB. Did; used forC. Did; use forD. Did; use to3. --- you to ride a motorbike?--- Yes. But last month I sold it and bought a car.A. Did; useB. Are; usedC. Do; useD. Did; used4. --- Hi, Ann! I won the first prize in the English Speech Contest.--- Congratulations! And I guess your parents must you.A. be mad atB. be proud ofC. be angry withD. be impolite to5. If you try your best, we will you even you may fail again and again.A. be pride ofB. take proud ofC. be proud inD. take pride in6. The flowers some water because they haven't been watered for many days.A. gainB. requestC. rescueD. require7. My little sister the room, because it's too dark outside.A. dare not leaveB. dare leaveC. dare to leaveD. dare not to leave8. --- Can you understand me?--- Sorry. I can understand what you've said.A. nearlyB. easilyC. hardlyD. exactly9. Kangkang the math exam because he was not careful enough.A. passedB. failedC. finishedD. won10. This kind of plant is seen in our city because it lives 4500m above sea level and is hard tofind.A. commonlyB. alwaysC. seldomD. easily11. My little brother shy, but now he a little outgoing.A. used to; isB. used to be; isC. used to; hasD. used to be; has12. you to get up early?A. Did; usedB. Do; useC. Did; useD. Do; used13. I keep dogs for protection, but now I keep them as pets.A. would ratherB. had betterC. used toD. have to14. Jenny's uncle is a scientist. She is proud him.A. fromB. atC. inD. of15. Mr. Wang takes great in the success of his two children.A. proudB. timeC. prideD. trouble16. The flowers some water because they haven't been watered for a few days.A. requireB. reachC. prepareD. order17. --- The boy sing loudly before so many people.--- Oh, maybe he feels shy.A. not dare toB. dare toC. dare notD. dares18. --- I want to know more about how to use this word.--- You can look it up in the dictionary.A. mostlyB. exactlyC. nearlyD. hardly19. --- What's the matter?--- I studied for the math test for a whole night, but I .A. failedB. passedC. lostD. won20. This kind of flower is seen in our hometown because it grows 4000 meters above sea leveland is hard to find.A. commonlyB. seldomC. easilyD. always二、单词拼写(单句首字母填空)（共20小题；共20分）21. Tom was ill yesterday, so he didn't take part in the meeting. He was a .22. Mr. Hand has a great i on his kids.23. Barry had a very successful i this morning. He will go to work next week.24. What he said always made us laugh. We all think he is very h .25. --- What are you doing?--- I am studying for the English e .26. Ann kept s all day because his little brother broke her toy bear.27. Cold running water is h to treat a small burn.28. Before the meeting began, I made the necessary i .29. In g , I agree to what you said.30. You can't use the car. It's p . Its owner is Mr. Green.31. --- How many students are a today?--- None. Everyone is here.32. My English teacher had a great i on me.33. I know you'll have an i tomorrow. I hope you can get the job.34. The h story made all of us laugh.35. Mr. Wu felt sick. The doctor gave him a careful e .36. --- Why are you s ?--- I don't want to talk because of the bad news.37. He is very h . He often helps us with our English study.38. The i of this kind of machines made it possible to make things quickly.39. In g , he can get along well with his classmates.40. You can't go into p rooms if you aren't allowed. That's impolite.三、单词拼写(根据中文提示拼写单词)（共20小题；共20分）41. The man we saw yesterday is so (幽默) that we all like him very much.42. The children went out and the room was (寂静的).43. Lucy is polite and (乐于助人的) and we all like her.44. You have to get at least 80 (分数) to pass the test.45. After the (访谈), the boy became happy and lively.46. Please make an (介绍) to Project Hope.47. David (不及格) his math exam last term.48. His wife teaches physics in a (私人的, 私有的) school.49. Hey, children! Don't make noise in the (背景). It is on air now.50. What is the (影响) of television on children?51. Jim is so (幽默的) that he is always making us laugh.52. Everybody was active in the meeting except Tom. He kept (沉默的) all the time.53. Tom is such an honest and (乐于助人的) boy that all the neighbors like him.54. They won the basketball match yesterday. The (成绩) was 5:3.55. Sally became a member of the company after the job (面试).56. Please write a letter of (介绍) for me, Sally.57. If you (失败) for the first time, you will have a second chance to do it again.58. It's impolite to read others' (私人的) letters without permission.59. Volunteers from different (背景) feel like part of one big family.60. This book has a great (影响) on the children.四、翻译(根据中文提示完成句子)（共10小题；共20分）61. 她年轻的时候常常把钥匙忘在家里。
人教版 九年级化学 第四单元 自然界的水 知识点归纳及练习题(含答案)
第四单元 自然界的水（一）地球上水的组成及分布：海洋水含量最多，占地球总水量的96.53％，其他三种水总和只有占3.47％，因此我们看到地球表面大部分面积为蓝色就是这个原因。
（二）水的重要性质水是一种很好的溶剂，能有效去除污物杂质。
纯水--无色、无味、无臭，被称作是"通用溶剂"，在平时没提到具体是什么溶剂时，都会把溶剂默认成水。
1.电解水的实验。
(1)在水电解器的玻璃管里注满水，接通直流电；(2)可以观察到:两个电极上出现 气泡 ，两玻璃管内液面 下降 ；(3)用点燃的火柴接触液面下降较多(即产生气体体积较多 )的玻璃管尖嘴，慢慢打开活塞，观察到气体能燃烧(火焰呈 淡蓝色 ，点燃时发出一声轻微的爆鸣声)，这个玻璃管中产生的是 氢 气；用带火星木条接近液面下降较少的玻璃管尖端，慢慢打开活塞，观察到 带火星的木条复燃 ，这是 氧 气；(4)产生氢气的那个电极是 负 极，产生氧气的那个电极是 正 极； (5)通过精确实验测得电解水时，产生的氢气和氧气的体积比是 2:1 。
2.电解水的实验说明水在通电条件下，生成 氢气 和 氧气 ，这个过程的文字表达式为 水−−→−通电 氢气+氧气 。
3.实验结论:氢气中的 氢 和氧气中的 氧 是从水中产生的，所以水是由 氢和氧组成的。
（四）水的净化1、水的净化海洋水——海洋 河流、湖泊 陆地水—— 土壤、沼泽冰川…… 大气水——空气 生物水——生物体 地 球上的水蒸馏 √ √ √2、硬水和软水 （1）、水的硬度：水中含钙、镁等矿物质成分越多，水的硬度越大。
（2）、硬水软水的区别：用肥皂水，产生产生浮渣较少、泡沫较多的是软水，产生浮渣较多、泡沫较少的是硬水（3）、硬水的软化方法：生活中软化方法——煮沸、最高软化方法——蒸馏 （五）防止水体污染：（1）水体污染源：①工业污染：工厂的“三废”(废气、废渣、废液)倒入江河、地下，污染江河和地下水。
②农业污染：农药、化肥的不合理使用，也易造成水的污染。
【精校版】人教版英语九年级Unit4单元练习（含答案）
【精校版】人教版英语九年级Unit4单元练习（含答案）人教版精品英语资料（精校版）Unit4 I used to be afraid of the dark.单元练习一、听力(听力)（共20小题；共20分）一、听力选择（共20小题，计20分）(一)录音中有五个句子，每个句子听一遍，然后从每小题A、B、C中选出适合每个句子的答语。
1. A. I'm sorry to hear that.B. Sure. I'd love to.C. I think so.2. A. A cheetah. B. I'm terrified of it. C. It's furry.3. A. Because they are intelligent.B. Because they are endangered.C. Because they're kind.4. A. Get up early.B. Don't use paper towels.C. Do more exercise.5. A. About 100 feet. B. About 1,000 pounds. C. About 10 meters.(二)录音中有五组对话，每组对话听一遍，然后从每小题A、B、C中选出能回答每个问题的正确答案。
6. Where are the two speakers talking probably?A. At home.B. In a shop.C. At school.7. What behavior is hard to stop?A. Littering.B. Wasting paper.C. Riding in cars.8. How did Laura go to the zoo last weekend?A. On foot.B. By bike.C. By car.9. Who does Emma teach to use computers?A. Children.B. Disabled people.C. Old people.10. What's near the school?A. A supermarket.B. A river.C. A lake.(三)录音中有一段对话，听对话两遍，然后从每小题A、B、C中选出能回答每个问题的正确答案。
新人教版九年级第四单元测试题附答案
新人教版九年级第四单元测试题附答案Unit 4I used to be afraid of the dark.(时间：100分钟，满分：100分)Ⅰ.单项选择。
(每小题1分，共15分)( )1.—Tim is very active.—Sure. But he used to be ________ in class.A. silentB. quiteC. outgoingD. funny( )2.The government tried to deal ________ the problem of homelessness in the city.A. aboutB. inC. onD. with( )3.Miss Chen has a ________ son.A.15-year-oldB.15-years-oldC.15-year-oldsD.15 years old( )4.I don't want to ________ you. You must decide what to do by yourself.A. helpB. influenceC. askD. refuse( )5.I was so ________ that my son had won the first prize in the singing competition.A. angryB. proudC. nervousD. pride( )6.—Mr.Lee is really good at telling jokes. This makes him a popular teacher.—You've got the point. Students all like ________ teachers.A. kindB. carefulC. humorousD. polite( )7.If you don't work hard for most of the year and then work hard for only a few days before the exam，you will probably ________.A. succeedB. finishC. failD. pass( )8.—I advise the parents ________ their child alone at home.—I agree with you.A. to leaveB. leaveC. not to leaveD. not leave( )9. Please don't talk about ________ problems in public. It will make me shy.A. seriousB. privateC. creativeD. convenient( )10.The famous singer will come and sing for us ________ , so I will go to the concert tonight.A. in personB. take care ofC. look afterD. all the time( )11.—Look，Gary！I bring you a comic.—Great. It's ________ what I need.A. quicklyB. hardlyC. exactlyD. nearly( )12.I had a good time at the party，________ I didn't know anybody.A. as ifB. sinceC. whileD. even though( )13.—Mr.Lee said he ________ teaching English because he loved children.—Yes. And his love for children and teaching makes him a great teacher.A. turned upB. gave upC. took upD. set up( )14.—I have got used to living in this city. But I still miss my old friends in Taiyuan ________.—Old friends are best, right?A. in timeB. at the same timeC. from time to timeD. on time( )15.—Did she use to live in the countryside?—________.But now she lives in the city.A. Yes, she usedB. Yes, she didC. No, she didn'tD. No, she usedn'tⅡ.完形填空。
新人教版初中数学九年级数学上册第四单元《圆》测试题(包含答案解析)(4)
一、选择题1．如图，AC 为半圆的直径，弦3AB =，30BAC ∠=︒，点E 、F 分别为AB 和AC 上的动点，则BF EF +的最小值为（ ）A ．3B ．332C ．3D ．332+ 2．如图，A 是B 上任意一点，点C 在B 外，已知2AB =，4BC =，ACD △是等边三角形，则BCD △的面积的最大值为（ ）A ．434+B ．43C ．438+D ．633．如图，AB 是⊙O 的弦，AO 的延长线交过点B 的⊙O 的切线于点C ，如果∠ABO =30°，则∠C 的度数是（ ）A ．70°B ．45°C ．30°D ．20°4．如图，AB 是半圆O 的直径，20BAC =︒∠，则D ∠的度数是（ ）A ．70°B ．100°C ．110°D ．120°5．如图，在半径为8的O 中，点A 是劣弧BC 的中点，点D 是优弧BC 上一点，30D ︒∠=，下列结论不正确的是（ ）A ．OA BC ⊥B ．83BC = C ．四边形ABOC 是菱形D ．扇形OAC 的面积为643π 6．在⊙O 中，AB 为直径，点C 为圆上一点，将劣弧AC 沿弦AC 翻折交AB 于点D ，连结CD ．如图，若点D 与圆心O 不重合，∠BAC ＝25°，则∠BDC 的度数（ ）A ．45°B ．55°C ．65°D ．70° 7．如图所示，AB 是O 的直径，点C ，D 在O 上，21BDC ∠=︒，则AOC ∠的度数是（ ）A ．136°B ．137°C ．138°D ．139° 8．已知AB 是经过圆心O 的直线，P 为O 上的任意一点，则点P 关于直线AB 的对称点P '与O 的位置关系是（ ） A ．点P '在⊙○内 B ．点P '在O 外 C ．点P '在O 上 D ．无法确定9．如图，线段AB 是⊙O 的直径，弦CD 丄AB ，∠CAB =20°，则∠BOD 等于（ ）A ．20°B ．40°C ．50°D ．60° 10．已知圆锥的底面半径为3cm ，母线长为6cm ，则圆锥的侧面积是（ ）A ．18cm 2B ．218cm πC ．27cm 2D ．227cm π11．如图，P 与y 轴交于点()0,4M -，()0,10N -，圆心P 的横坐标为4-，则P 的半径为（ ）A ．3B ．4C ．5D ．6 12．一个圆锥的底面直径为4 cm ，其侧面展开后是圆心角为90°的扇形，则这个圆锥的侧面积等于（ ）A ．4πcm 2B ．8πcm 2C ．12πcm 2D ．16πcm 2第II 卷（非选择题）请点击修改第II 卷的文字说明参考答案二、填空题13．如图，PA 、PB 是⊙O 的切线，切点分别为A 、B ，若OA=2，∠P=60°，则AB 的长为________14．已知ABC 的周长为30，面积为20，其内角平分线交于点O ，则点O 到边BC 的距离为________．15．如图，四边形ABCD 是O 的内接四边形，对角线AC ，BD 交于点E ，且AC BD AB ==，若70AEB ∠=︒，则AOB ∠等于______︒．16．如图，在平面直角坐标系中，点()3,4A ，()3,0B ，以A 为圆心，2为半径作A ，点P 为A 上一动点，M 为OP 的中点，连接BM ，设BM 的最大值为m ，最小值为n ，则m n -的值为_________．17．如图，已知AB 是O 的直径，点C ，D 在O 上，2BC =，30CDB ∠=︒，则O 的半径为_____．18．半径为5的⊙O 是锐角三角形ABC 的外接圆，AB=BC ，连结OB 、OC ，延长CO 交弦AB 于D ，若△OBD 是直角三角形，则弦BC 的长为______________．19．在△ABC 中，已知∠ACB ＝90°，BC ＝3，AC ＝4，以点C 为圆心，2.5为半径作圆，那么直线AB 与这个圆的位置关系分别是_________．20．如图，直线AB ，CD 相交于点O ，∠AOC=30°，半径为1cm 的的圆心P 在射线OA 上，且与点O 的距离为6cm ，以1cm/s 的速度沿由A 向B 的方向移动，那么与直线CD 相切时，圆心P 的运动时间为 _____．三、解答题21．如图，已知点A 、B 的坐标分别是(0，0) ，(4，0)，将ABC 绕A 点按逆时针方向旋转90°后得到A B C '''．（1）画出A B C '''（不要求写出作法）；（2）写出点C '的坐标；（3）求旋转过程中点B 所经过的路径长．22．如图，已知AB 是O 的一条弦，DE 是O 的直径且DE AB ⊥于点C ． （1）若3,5OC OA ==，求AB 的长；（2）求证：EAO BAD ∠=∠．23．如图，AB 是O 的一条弦，⊥OD AB ，垂足为C ，OD 交O 于点D ，点E 在O 上，若50AOD ．（1）求DEB ∠的度数：（2）若3OC =，5OA =，①求弦AB 的长；②求劣弧AB 的长．24．如图，在平面直角坐标系中有一矩形ABCD （每一小格为一个单位长度），将矩形ABCD 绕着点A 逆时针旋转90°后得到新的图形．（1）请画出旋转后的图形，旋转后C 点对应点的坐标为______．（2）请计算点C 在旋转过程中的路径长．25．如图，已知直线l 与⊙O 相离，过圆心O 画OA ⊥l 于点A ，交⊙O 于点P 且OA =5，点B 为⊙O 上一点BP 的延长线交直线l 于点C 且AB=AC .（1）判断AB 与⊙O 有怎样的位置关系，并说明理由；（2）若25PC =，求⊙O 的半径.26．图①、图②均为 4×4 的正方形网格，线段 AB 、BC 的端点均在格点上，按要求在图①、图②中作图并计算其面积．（1）在图①中画一个四边形 ABCD ，点D 在格点上，使四边形 ABCD 有一组对角相等，并求=四边形ABCD S ．（2）在图②中画一个四边形 ABCE ，点E 在格点上，使四边形 ABCE 有一组对角互补，并求ABCE S =四边形 ．【参考答案】***试卷处理标记，请不要删除一、选择题1．B解析：B【分析】作B点关于直径AC的对称点B′，过B′点作B′E⊥AB于E，交AC于F，如图，利用两点之间线段最短和垂线段最短可判断此时FB＋FE的值最小，再判断△ABB′为等边三角形，然后计算出B′E的长即可．【详解】解：作B点关于直径AC的对称点B′，过B′点作B′E⊥AB于E，交AC于F，如图，则FB＝FB′，∴FB＋FE＝FB′＋FE＝B′E，此时FB＋FE的值最小，∵∠BAC＝30°，∴∠B′AC＝30°，∴∠BAB′＝60°，∵AB＝AB′，∴△ABB′为等边三角形，∵B′E⊥AB，∴AE＝BE＝32，∴B′E3＝332，即BF＋EF 33．故选：B．【点睛】本题考查了圆周角定理：在同圆或等圆中，同弧或等弧所对的圆周角相等，都等于这条弧所对的圆心角的一半．推论：半圆（或直径）所对的圆周角是直角，90°的圆周角所对的弦是直径．也考查了等腰三角形的性质．2．A解析：A【分析】以BC 为边作等边BCM ，连接DM ，则DCM CAB ≅△△，根据全等三角形的性质得到DM=AB=2为定值，即点D 在以M 为圆心，半径为2的圆上运动，当点D 运动至BC 为中垂线与圆的交点时，BC 边上的高取最大值为232+，根据三角形的面积即可得到结论．【详解】解：以BC 为边作等边BCM ，连接DM ，∵60DCA MCB ==∠∠，∴DCM ACB =∠∠，∵DC=AC ，MC=BC ，∴DCM CAB ≅△△（SAS ），∴DM=AB=2为定值， 即点D 在以M 为圆心，半径为2的圆上运动，当点D 运动至BC 为中垂线与圆的交点时，BC 边上的高取最大值为232，此时面积为：434故选：A【点睛】本题考查了等边三角形的性质，三角形面积的计算，找出点D 的位置是解题的关键． 3．C解析：C【分析】由BC 是⊙O 的切线，OB 是⊙O 的半径，得到∠OBC =90°，根据等腰三角形的性质得到∠A =∠ABO =30°，由外角的性质得到∠BOC =60°，即可求得∠C =30°．【详解】∵BC 是⊙O 的切线，OB 是⊙O 的半径，∴∠OBC =90°，∵OA =OB ，∴∠A =∠ABO =30°，∴∠BOC =60°，∴∠C =30°．故选：C ．【点睛】本题考查了切线的性质，等腰三角形的性质，三角形的外角性质，解题的关键是灵活运用所学知识解决问题．4．C解析：C【分析】先根据圆周角定理可得90ACB ∠=︒，再根据直角三角形的性质可得70B ∠=︒，然后根据圆内接四边形的性质即可得．【详解】AB 是半圆O 的直径，90ACB ∴∠=︒，20BAC ∠=︒，9070B BAC ∴∠=︒-∠=︒， 又四边形ABCD 是圆O 内接四边形，180110D B ∴∠=︒-∠=︒，故选：C ．【点睛】本题考查了圆周角定理、直角三角形的性质、圆内接四边形的性质，熟练掌握圆周角定理是解题关键．5．D解析：D【分析】利用垂径定理可对A 进行判断；根据圆周角定理得到∠AOC=2∠D=60°，则△OAC 为等边三角形，根据等边三角形的性质和垂径定理可计算出BC =B 进行判断；利用AB=AC=OA=OC=OB 可对C 进行判断；通过判断△AOB 为等边三角形，再根据扇形的面积公式可对D 进行判断．【详解】解：A.∵点A 是劣弧BC 的中点，∴OA ⊥BC ，所以A 正确，不符合题意；B.∵∠AOC=2∠D=60°，OA=OC ，∴△OAC 为等边三角形，∴BC=2×8×sin30°=2×8×2=B 正确，不符合题意； C. 同理可得△AOB 为等边三角形，∴AB=AC=OA=OC=OB ，∴四边形ABOC 是菱形，所以C 正确，不符合题意；D.∵∠AOC=60°，OC=8∴扇形OAC 的面积为2608323603ππ⨯=，所以D 错误，符合题意． 故选：D ．【点睛】本题考查了圆心角、弧、弦的关系：在同圆或等圆中，如果两个圆心角、两条弧、两条弦中有一组量相等，那么它们所对应的其余各组量都分别相等．同一条弦对应两条弧，其中一条是优弧，一条是劣弧，而在本定理和推论中的“弧”是指同为优弧或劣弧． 6．C解析：C【分析】连接BC ，求出∠B ＝65°，根据翻折的性质，得到∠ADC+∠B ＝180°，进而得到∠BDC=∠B ＝65°．【详解】解：连接BC ，∵AB 是直径，∴∠ACB ＝90°，∵∠BAC ＝25°，∴∠B ＝90°﹣∠BAC ＝90°﹣25°＝65°，根据翻折的性质，AC 所对的圆周角为∠B ，ABC 所对的圆周角为∠ADC ，∴∠ADC+∠B ＝180°，∴∠BDC=∠B ＝65°，故选：C ．【点睛】本题考查了圆周角定理及其推论，根据题意添加适当辅助线是解题关键．7．C解析：C【分析】利用圆周角定理求出∠BOC 即可解决问题．【详解】解：∵∠BOC=2∠BDC ，∠BDC=21°，∴∠BOC=42°，∴∠AOC=180°-42°=138°．故选：C．【点睛】本题考查了圆周角定理，解题的关键是熟练掌握圆周角定理，属于中考常考题型．8．C解析：C【分析】圆是轴对称图形，直径所在的直线就是对称轴，从而得到圆上的点关于对称轴对称的点都在圆上求解．【详解】解：∵圆是轴对称图形，直径所在的直线就是对称轴，∴点P关于AB的对称点P′与⊙O的位置为：在⊙O上，故选：C．【点睛】本题考查了点与圆的位置关系，利用了圆的对称性求解．9．B解析：B【分析】由线段AB是⊙O的直径，弦CD丄AB，根据垂径定理的即可求得=BC BD，然后由圆周角定理，即可求得答案．【详解】解：∵线段AB是⊙O的直径，弦CD丄AB，∴=BC BD，∵∠CAB=20°，∴∠BOD=2∠CAB=2×20°=40°．故选：B．【点睛】此题考查了圆周角定理以及垂径定理．此题难度不大，注意掌握数形结合思想的应用．10．B解析：B【分析】已知底面半径即可求得底面周长，即展开图中，扇形的弧长，然后根据扇形的面积公式即可求解．【详解】解：底面周长是2×3π=6π，则圆锥的侧面积是：12×6π×6=18π（cm2）．故选：B．【点睛】本题考查了圆锥的计算，利用了圆的周长公式和扇形面积公式求解．11．C解析：C【分析】过点P 作PD ⊥MN ，连接PM ，由垂径定理得DM ＝3，在Rt △PMD 中，由勾股定理可求得PM 为5即可．【详解】解：过点P 作PD ⊥MN ，连接PM ，如图所示：∵⊙P 与y 轴交于M （0，−4），N （0，−10）两点，∴OM ＝4，ON ＝10，∴MN ＝6，∵PD ⊥MN ，∴DM ＝DN ＝12MN ＝3， ∴OD ＝7，∵点P 的横坐标为−4，即PD ＝4，∴PM 22PD DM +2243+5，即⊙P 的半径为5，故选：C ．【点睛】本题考查了垂径定理、坐标与图形性质、勾股定理等知识；熟练掌握垂径定理和勾股定理是解题的关键． 12．D解析：D【分析】设展开后的圆半径为r ，根据圆锥性质可知底面周长就等于展开后扇形的弧长，然后算出展开后扇形的半径，进而计算出扇形的面积．【详解】解：设展开后的扇形半径为r ，由题可得：4π=2r π解得r =8∴S扇形=14π×82=16π故选：D【点睛】此题主要考查了圆锥的计算，正确理解圆锥侧面展开图与各部分对应情况是解题关键．二、填空题13．【分析】连接AB并延长BO交圆于C连接ACPAPB是⊙O的切线由切线长定理知PA=PB；又∠P=60°则等腰三角形APB是等边三角形则有∠ABP=60°BC是直径；由直径对的圆周角是直角得∠PBC=解析：23【分析】连接AB，并延长BO交圆于C，连接AC，PA、PB是⊙O的切线，由切线长定理知PA=PB；又∠P=60°，则等腰三角形APB是等边三角形，则有∠ABP=60°，BC是直径；由直径对的圆周角是直角得∠PBC=90°，则在Rt△ABC中，有∠ABC=30°，进而可知AB的长．【详解】解：连接AB，并延长BO交圆于C，连接AC，∵PA、PB是⊙O的切线，∴PA=PB，又∵∠P=60°，∴∠PBA=60°；又∵BC是圆的直径，∴CB⊥PB，∠BAC=90°，∴∠ABC=30°，而BC=4，∴在Rt△ABC中，cos30°=AB BC，∴323故答案为：3【点睛】本题利用了切线长定理，等边三角形的判定和性质，弦切角定理，直角三角形的性质，正弦的概念求解．注意本题的解法不唯一．掌握相关知识是解题的关键．14．【分析】过O作OD⊥BC于DOE⊥AB于EOF⊥AC于F连接OAOBOC根据三角形的内心和角平分线的性质得出OE=OD=OF再根据三角形的面积公式求出即可【详解】如图过O作OD⊥BC于DOE⊥AB于解析：4 3【分析】过O作OD⊥BC于D，OE⊥AB于E，OF⊥AC于F，连接OA、OB、OC，根据三角形的内心和角平分线的性质得出OE=OD=OF，再根据三角形的面积公式求出即可．【详解】如图，过O作OD⊥BC于D，OE⊥AB于E，OF⊥AC于F，连接OA、OB、OC，∵O是△ABC内角平分线的交点，∴OE=OF=OD，∵△ABC的面积是20，∴S△AOB+S△BOC+S△AOC=20，∴111AB OE BC OD222⨯⨯+⨯⨯+×AC×OF=20，∴(AB+BC+AC)×OD=40，∵△ABC的周长为30，∴AB+BC+AC=30，∴OD=404303=，∴即O到BC的距离是43，故答案为：43．【点睛】本题考查了三角形的内心，角平分线的性质和三角形的面积等知识点，能求出OD=OE=OF 是解此题的关键．15．125【分析】根据题意先求出∠ABE=∠BAE=55°然后由等腰三角形的定义和三角形的内角和定理求出∠C=625°即可求出的度数【详解】解：根据题意∵在圆中有∴∴∴在△ABE 中∴在等腰△ABC 中则∴解析：125【分析】根据题意，先求出∠ABE=∠BAE=55°，然后由等腰三角形的定义和三角形的内角和定理，求出∠C=62.5°，即可求出AOB ∠的度数．【详解】解：根据题意，∵在圆中，有AC BD AB ==，∴AC BD =，∴AD BC =，∴ABD BAC ∠=∠，在△ABE 中，70AEB ∠=︒， ∴1(18070)552ABD BAC ∠=∠=⨯︒-︒=︒， 在等腰△ABC 中，AC AB =则1(18055)62.52C ∠=⨯︒-︒=︒， ∴2125AOB C ∠=∠=︒；故答案为：125．【点睛】本题考查了圆内接四边形的性质，圆周角定理，三角形的内角和定理，等腰三角形的定义，解题的关键是熟练掌握所学的知识，正确的进行解题．16．2【分析】方法一：在轴上取一点连接可求由可得由点在上运动可知共线时可以取得最大值或最小值最大值最小值由最大值与最小值求出即可；方法二：连接取中点连接利用三角形三边关系有可得作差计算即可【详解】解：方 解析：2【分析】方法一：在x 轴上取一点()6,0E ，连接PE ，可求3OB BE ==，5AE =，由OM PM =，OB BE =，可得12BM PE =，由点P 在A 上运动，可知P 、A 、B 共线时，可以取得最大值或最小值，最大值'527EP ==+=，最小值''523EP =-=，由最大值与最小值求出72m =，32n =即可；方法二：连接PA 、OA ，取OA 中点N ，连接MN 、BN ，利用三角形三边关系有BN MN BM BN MN -≤≤+，可得m BN MN =+，n BN MN =-，作差计算22m n MN PA -===即可．【详解】解：方法一：在x 轴上取一点()6,0E ，连接PE ，∵()3,0B ，()3,4A ，∴3OB BE ==，22345AE =+=，∵OM PM =，OB BE =，∴12BM PE =， ∵点P 在A 上运动， ∴P 、A 、B 共线时，可以取得最大值或最小值，最大值'527EP ==+=，最小值''523EP =-=，∴72m =，32n =， ∴2m n -=，故答案为2．方法二：连接PA 、OA ，取OA 中点N ，连接MN 、BN ，BN MN BM BN MN -≤≤+，m BN MN =+，n BN MN =-，22m n MN PA -===．故答案为：2．【点睛】本题考查三角形的中位线，勾股定理，三角形三边关系，线段和差，掌握三角形的中位线，勾股定理，三角形三边关系，线段和差，引辅助线构造准确图形是解题关键． 17．2【分析】根据圆周角定理得出∠A=∠CDB ∠ACB=90°根据含30°角的直角三角形的性质得出AB=2BC求出AB再求出半径即可【详解】解：∵∴∠A=∠CDB∵∠CDB=30°∴∠A=30°∵AB为解析：2【分析】根据圆周角定理得出∠A=∠CDB，∠ACB=90°，根据含30°角的直角三角形的性质得出AB=2BC，求出AB，再求出半径即可．【详解】解：∵=BC BC∴∠A=∠CDB，∵∠CDB=30°，∴∠A=30°，∵AB为⊙O的直径，∴∠ACB=90°，∵BC=2，∴AB=2BC=4，∴⊙O的半径是142⨯=，2故答案为：2．【点睛】本题考查了圆周角定理，含30°角的直角三角形的性质等知识点，能根据圆周角定理得出∠A=∠CDB和∠ACB=90°是解此题的关键．18．或【分析】如图1当∠DOB=90°时推出△BOC是等腰直角三角形于是得到BC=；如图2当∠ODB=90°时推出△ABC是等边三角形解直角三角形得到BC=AB=【详解】如图1当∠DOB=90°时∴∠B解析：52或53【分析】如图1，当∠DOB=90°时，推出△BOC是等腰直角三角形，于是得到BC=252OB=；如图2，当∠ODB=90°时，推出△ABC是等边三角形，解直角三角形得到BC=AB=53．【详解】如图1，当∠DOB =90°时，∴∠BOC=90°∴ △BOC 是等腰直角三角形∴BC=252OB =如图2，当∠ODB=90°时，即CD AB ⊥∴ AD=BD∴ AC=BC∵ AB=BC∴ △ABC 是等边三角形∴ ∠DBO=30°∵ OB=5∴ 35322BD OB == ∴ BC=AB=3综上所述：若△OBD 是直角三角形，则弦BC 的长为5253故答案为：5253．【点睛】本题考查了三角形的外接圆与外心，等边三角形的判定和性质，等腰直角三角形的性质，正确的作出图形是解题的关键．19．相交【分析】根据勾股定理作于点则的长即为圆心到的距离利用等积法求出的长与半径比较大小再作判断【详解】解：如图作于点∵的两条直角边斜边即半径是直线与圆相交【点睛】此题考查的是勾股定理直线与圆的位置关系 解析：相交【分析】根据勾股定理，5AB =．作CD AB ⊥于点D ，则CD 的长即为圆心C 到AB 的距离．利用等积法求出CD 的长，与半径比较大小，再作判断． 【详解】解： 如图， 作CD AB ⊥于点D ．∵Rt ABC 的两条直角边3BC =，4AC =，∴斜边5AB =．1122ABC S AC BC AB CD ∆==，即 512CD ，2.4CD．>，半径是2.5 2.4∴直线与圆C相交．【点睛】此题考查的是勾股定理，直线与圆的位置关系，熟悉相关性质是解题的关键．20．4秒或8秒【分析】⊙P与CD相切应有两种情况一种是在射线OA上另一种在射线OB上设对应的圆的圆心分别在MN两点当P在M点时根据切线的性质在直角△OME中根据30度的角所对的直角边等于斜边的一半即可求解析：4秒或8秒【分析】⊙P与CD相切应有两种情况，一种是在射线OA上，另一种在射线OB上，设对应的圆的圆心分别在M，N两点．当P在M点时，根据切线的性质，在直角△OME中，根据30度的角所对的直角边等于斜边的一半，即可求得OM的长，进而求得PM的长，从而求得由P到M移动的时间；根据ON=OM，即可求得PN，也可以求得求得由P到M移动的时间．【详解】①当⊙P在射线OA上，设⊙P于CD相切于点E，P移动到M时，连接ME．∵⊙P与直线CD相切，∴∠OEM=90°，∵在直角△OPM中，ME=1cm，∠AOC=30°，∴OM=2ME=2cm，则PM=OP-OM=6-2=4cm，∵⊙P以1cm/s的速度沿由A向B的方向移动，∴⊙P移动4秒时与直线CD相切；②当⊙P的圆移动到直线CD的右侧，同理可求ON=2则PN=6+2=8cm．∴⊙P移动8秒时与直线CD相切．故答案为：4秒或8秒．【点睛】本题主要考查了切线的性质和直角三角形的性质，注意已知圆的切线时，常用的辅助线是连接圆心与切点，本题中注意到分两种情况讨论是解题的关键．三、解答题21．（1）见解析；（2）(﹣2，5)；（3）2π【分析】（1）根据旋转的性质得到B'、C'，顺次连线即可；（2）根据（1）直接得到答案；（3）利用弧长公式计算即可.【详解】解：（1）如图所示，△A′B′C′即为△ABC绕A点按逆时针方向旋转90°后的图形；（2）点C′（﹣2，5）；（3）点B所经过的路径长＝9042 180ππ⨯=.【点睛】此题考查旋转的性质，确定直角坐标系中点的坐标，弧长的计算公式，正确画出旋转图形是解题的关键.22．（1）8AB=；（2）见解析【分析】（1）由DE ⊥AB ，得∠OCA ＝90°，OC ＝3，OA ＝5，通过勾股定理即可求出AC ；由DE 是⊙O 的直径，所以DE 平分AB ，得到AB ＝2AC ，即可得到AB ；（2）由OA ＝OE ，得∠EAO ＝∠E ，而直径DE ⊥AB ，则AD BD =，所以∠E ＝∠BAD ，由此得到∠EAO ＝∠BAD ．【详解】（1）∵DE ⊥AB∴∠OCA=90°，则OC 2+AC 2=OA 2又∵OC ＝3，OA ＝5，∴AC=4，∵DE 是⊙O 的直径，且DE ⊥AB ，∴AB ＝2AC=8（2）证明∵ EO=AO ，∴∠E=∠EAO又∵DE 是⊙O 的直径，且DE ⊥AB ，∴AD BD =，∴∠E=∠BAD∴∠EAO ＝∠BAD ．【点睛】本题考查了圆周角定理．在同圆或等圆中，同弧和等弧所对的圆周角相等，一条弧所对的圆周角是它所对的圆心角的一半．同时考查了垂径定理以及勾股定理．23．（1）25°；（2）①8；②25π9 【分析】（1）根据垂径定理和圆周角定理求解即可；（2）①根据勾股定理和垂径定理求解即可；②先求出100AOB ∠=︒，再根据弧长公式计算即可．【详解】解：（1）∵⊥OD AB ，∴AD BD =， ∴11502522DEB AOD ∠=∠=⨯︒=︒； （2）①∵3OC =，5OA =，⊥OD AB ， ∴4AC ==，∴AB=2AC=8；②∵50AOD ，AD BD =，∴100AOB ∠=︒， ∵5OA =，∴弧AB 的长π1005π25π1801809n r ⨯===． 【点睛】 本题考查了垂径定理，圆周角定理，弧、弦、圆心角的关系，以及弧长公式，熟练掌握各知识点是解答本题的关键．24．（1）图见解析，(2,3)-；（2）52π． 【分析】（1）先根据旋转的性质分别画出点,,B C D 旋转后的对应点,,B C D '''，再顺次连接点,,,A B C D '''可得旋转后的图形，然后根据旋转的性质可得四边形AB C D '''是矩形，,AD AD C D CD '''==，由此即可得；（2）先利用矩形的性质、勾股定理求出AC 的长，再利用弧长公式即可得．【详解】（1）先根据旋转的性质分别画出点,,B C D 旋转后的对应点,,B C D '''，再顺次连接点,,,A B C D '''可得旋转后的图形，如图所示：由题意得：(2,0),(5,0),(5,4),(2,4)A B C D ，2,3,4OA AB CD BC AD ∴=====，由旋转的性质得：4,3AD AD C D CD '''====，四边形AB C D '''是矩形， 2,OD AD OA C D AD '''''∴=-=⊥，∴点C '的坐标为(2,3)C '-，即旋转后C 点对应点的坐标为(2,3)-；（2）由题意得：点C 在旋转过程中的路径长为CC '的长，如图所示：四边形ABCD 是矩形，3,4AB BC ==，∴对角线225AC AB +BC ，由旋转的性质得：90CAC '∠=︒，则CC '的长为90551802ππ⨯=，即点C 在旋转过程中的路径长为52π． 【点睛】 本题考查了画旋转图形、旋转的性质、弧长公式等知识点，熟练掌握旋转的性质是解题关键．25．（1）AB 与⊙O 相切，理由见解析；（2）3【分析】（1）连接OB ，由题意易得∠ACB =∠ABC ，∠OAC =90°，则有∠APC =∠OBP ，进而可证OB ⊥AB ，则问题可证；（2）设⊙O 的半径为x ，由（1）得OP = OB = x ，则有PA = 5-x ，然后根据勾股定理可进行求解．【详解】解：（1）AB 与⊙O 相切，理由：连接OB ，如图所示：∵AB=AC ，∴∠ACB =∠ABC ，又∵OA ⊥l ，∴∠OAC =90°，∴∠ACB +∠APC = 90°，又∵OP=OB ，∴∠O PB =∠OBP ，∵∠OPB =∠APC ，∴∠APC =∠OBP ，∴∠OBP +∠ABC = 90°，即OB ⊥AB ，∵点B 是半径OB 的外端点，∴AB 是⊙O 的切线；(2)设⊙O 的半径为x ，∴OP = OB = x又∵OA = 5，25PC =∴ PA = 5-x在Rt △ACP 中∴ AC 2 =PC 2 -PA 2 =(()22255105x x x --=-+-， 在Rt △OAB 中∴ AB 2 =OA 2 -OB 2 =222525x x -=-又∵AB = AC∴2225105x x x -=-+-，解得：x =3∴⊙O 的半径为3．【点睛】本题主要考查切线的判定定理，熟练掌握切线的判定定理是解题的关键．26．（1）图见详解，6 ；（2）图见详解，4.5【分析】（1）过C 画AB 的平行线，过A 画BC 的平行线，两线交于一点D ，根据平行四边形的判定定理可得四边形ABCD 是平行四边形，由平行四边形的性质可知∠CBA=∠CDA ，然后用用割补法求出面积即可；（2）根据图中正方形网格和∠B 的特点，作出∠E 与∠B 互补，然后用割补法求面积即可．【详解】解：（1）如图，S 四边形ABCD =3×4-122⨯×2-222⨯-112⨯=6； （2）如图，S 四边形ABCE =3×3-122⨯×2-222⨯-112⨯=92． 【点睛】 此题主要考查了应用设计作图，首先要理解题意，弄清问题中对所作图形的要求，然后利用割补法求面积．。
新人教版九年级第四单元精选练习题附答案
新人教版九年级第四单元精选练习题附答案Unit 4I used to be afraid of the dark.第一课时Section A(1a～2d)01基础过关Ⅰ. 根据句意及汉语提示填写单词。
1. Mr. Wang is ________(幽默的). He often makes us laugh.2. Now pollution is a ________(严重的)problem.3. Lily used to be quiet, but she is very ________(开朗的)now.4. Mary got the highest ________(得分)on the exam.5. Don't eat much junk food. You should ________(改变)your eating habits.Ⅱ. 用括号内所给单词的适当形式填空。
6. Our English teacher is ________(friend)to us. We regard her as our friend.7. Tom is such an honest and ________(help)boy that all the neighbors like him.8. No matter what you ask, she always keeps ________(silence)and says nothing.9. We can see some fishes ________(swim)in the river now.10. My sister always wears ________(glass)when she goes out.Ⅲ. 根据汉语意思完成句子,每空一词。
11. 你过去常常下午喝茶吗？________ ________ ________ ________ drink tea in the afternoon?12. 周末琳达时常去上班。
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新人教版九年级第四单元精选练习题附答案Unit 4I used to be afraid of the dark.第一课时Section A(1a～2d)01基础过关Ⅰ. 根据句意及汉语提示填写单词。
1. Mr. Wang is ________(幽默的). He often makes us laugh.2. Now pollution is a ________(严重的)problem.3. Lily used to be quiet, but she is very ________(开朗的)now.4. Mary got the highest ________(得分)on the exam.5. Don't eat much junk food. You should ________(改变)your eating habits.Ⅱ. 用括号内所给单词的适当形式填空。
6. Our English teacher is ________(friend)to us. We regard her as our friend.7. Tom is such an honest and ________(help)boy that all the neighbors like him.8. No matter what you ask, she always keeps ________(silence)and says nothing.9. We can see some fishes ________(swim)in the river now.10. My sister always wears ________(glass)when she goes out.Ⅲ. 根据汉语意思完成句子,每空一词。
11. 你过去常常下午喝茶吗？________ ________ ________ ________ drink tea in the afternoon?12. 周末琳达时常去上班。
Linda goes to work at weekends ________ ________ ________ ________.13. 我个子高,留着短发并且戴副眼镜。
I am tall,________ ________ ________ and wear glasses.14. 自从我们搬到这座城市以来已经有10年了。
It ________ ________ ten years since we ________ to this city.15. 玩这种游戏有趣。
It's interesting ________ ________ this kind of game.02能力提升Ⅳ. 按要求完成下列句子,每空一词。
16. He used to play the guitar. (改为一般疑问句)________ he ________ to play the guitar?17. The boy is big and strong now. (改为感叹句)________ ________ and __________ the boy is now!18. Mike's grandpa has been dead for three years.(改为同义句)It ________ ________ three years ________ Mike's grandpa died.19. Your brother used to have long hair.(完成反意疑问句)Your brother used to have long hair,________ ________？20. There used to be a big park. (改为否定句)There ________ ________ to be a big park.Ⅴ. 补全对话。
根据对话内容,从方框中选择合适的选项补全对话。
(其中有两项多余)A: Hi, Eric, how do you go to work every day?B: I used to go to work by bike, but now I have to go by train.A: 21B: Because my company(公司)has moved to another city. Now everything has changed.A: Yes, it may be a long way to get to work. 22B: I have to get up at 5:30 every morning.A: Oh, so early! 23B: At least one and a half hours.A: It's a long trip. 24B: That's a good idea. I do sleep during the trip, or I will be sleepy all the morning.A: 25B: Yes. Sometimes I can't get home until 9:00 .A: Then you must be very tired after getting home.第二课时Section A(3a～3c)Ⅰ. 根据句意及汉语提示填写单词。
1. Alice took a picture with the mountains in the ________(背景).2. In the USA，many people have a ________(私人的)doctor.3. Please call this number if you ________(要求)any further information.4. The huge stone in the middle of the road weighs about ten ________(吨).5. Jack will have a(n) ________(面试)for a job next week.Ⅱ.用括号内所给单词的适当形式填空。
6. I don't dare ________(talk) in front of class.7. You should try to get over your ________(shy).8. India is an ________(Asia)country. It is on the southwest of China.9. Look! Two ________(guard)are walking towards us. Let's leave!10. My computer doesn't work. It requires ________(repair).Ⅲ. 根据汉语意思完成句子，每空一词。
11. 当他六岁的时候，他能骑自行车。
He ________ ________ ________ ride a bike when he was 6 years old.12. 如果你尽力了，你最终将成功。
If you try your best，you will ________ ________ in the end.13. 这个女孩成名之后，她获得了大量的关注。
She ________ ________ ________ ________ when the girl became famous.14. 现在中国自信且习惯于从容处理国内外困难局面。
China is now confident and gets used to ________ ________ all kinds of difficult situations at home or abroad calmly.15. 我们有个烦人的假期，天总是下雨。
02能力提升Ⅳ. 完形填空。
June 22nd，1993 is a day that I will never forget. It was on that day that my life __16__ forever.I was a nurse working in a being a single mother(单亲妈妈)for 12 years，I was finally __18__ to enjoy life with my four children.__19__ on June 22nd，1993，I had an accident on the way to work. I was seriously hurt. I __20__ my job，and I believed my life was over，too.I had a lot of surgeries(外科手术). After the first surgery，I was __21__ helpless and could do nothing for myself. Several months later，the doctor said there was __22__ else he could do and he let me go home.At home，I had to spend most of my time in the wheelchair. Though my children __23__ me carefully，I was upset and lost interest in everything.After several months of being sad，I started to look at my life differently. Now I realize __24__ the important thing in life is. I enjoy spending time with my family. And I start to appreciate(欣赏)the little things that I __25__ to care about before. I feel I'm given a second chance in my life.( ) B. kept C. stopped D. changed( ) B. restaurant C. hospital D. theater( ) B. busy C. afraid D. able( ) B. But C. Though D. And( ) B. lost C. liked D. hated( ) B. probably C. normally D. angrily( ) B. anything C. nothing D. something( ) after B. took after C. agreed with D. compared with( ) B. how C. what D. why( ) B. failed C. tried D. learned第三课时Section A(4a～4c),Ⅰ.用括号内所给单词的适当形式填空。