推荐K12学习2018届九年级英语全册Unit13We’retryingtosavetheearth

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[K12学习]2018届九年级英语全册Unit13We’retryingtosavetheearth第6课时学案新版人教新目标版

Unit 13 We’re trying to save the earth!Section B (3a—Self Check)【学习目标】1. 复习并巩固本单元出现的重点词汇和短语。

2. 学习并掌握重点句型：1) Which parts may be less nice and need to be improved?2) Give suggestions or possible ways to solve the problems.【重点难点】·Review the whole unit.·Use what we have learned to speaking, reading and writing.【课堂探究】写作训练:Write a letter to the city mayor about the problems and your suggestions.思路点拨：· In your letter, describe the environmental problems in your town or city. Explain how you feel about this person/ event.·Also, give suggestions or possible ways to solve the problems.例文赏析：Dear Mr. Mayor,Thanks for making some time to read this letter. I’m a native here. I think everyone in this city wants to have a bright and beautiful home. But there are some environmental problems in our city. The river used to be very clean, but now the river was dirty. Even the bottom of the river was full of rubbish. People are littering in the river, Factoriesare pouring rubbish into the river. The air has become really polluted around here. There are so many cars on the road these days. More and more people driving to work or school today. Factories that burn coal also pollute the air with a lot of black smoke. There is also too much rubbish and waste around our living places. People throw away rubbish like waste plastic in public places. This turns beautiful places into ugly places.To cut down environmental pollution, I think we should develop laws to stop f actories’littering. We should take the bus or subway instead of driving. Never take wooden chopsticks or plastic forks when buying takeaway food, remember to throw rubbish in the cans and keep public places clean and beautiful for everyone. I suggest that everyone in this town should play a part in improving the environment. I believe that our actions can make a difference and lead to a better future!Best wishes,John【达标练习】I.单项选择。

【K12教育学习资料】2018_2019学年九年级英语全册Unit13We’retryingtosa

Unit 13 We're trying to savethe earth!第2课时分层训练[Section A2 3a4c]Ⅰ.根据句意及汉语提示写出所缺的单词1．I think it is ________(残忍的) to kill the animals.2．2017·宿迁Most people in China couldn't ________(买得起) cars twenty years ago.3．Reading in the sun is ________(有害的) to your eyes.4．The government has made some ________(法律) to protect the wild animals.5．About 70 million sharks are traded in this ________(行业) every year.Ⅱ.从方框中选出合适的短语，并用其适当形式填空pay for, turn off, be harmful to,cut off, so far, take part in1．Please remember to ________________ the computer when you don't use it. It is a way to save energy.2．We have learned twelve units________________________________________________________________________.3．How much did you ________________ your books yesterday?4．Have you ever ________________ an environmental project?5．He had his finger ________________ in an accident at work.6．Junk food ________________ humans' health.Ⅲ.根据汉语意思完成句子1．他们在山顶发现了一座古老的庙宇。

【K12教育学习资料】2018年九年级英语全册Unit13We’retryingtosavethee

第七节阅读理解Some of the greatest problems we face today are the destruction(破坏)of our environment. Brown clouds，polluted water，endangered wild animals...these problems seem so huge.So my family does what we can.We take cloth bags to stores instead of using plastic bags.We walk where we don't have to drive...But does it do any good？When I am the only one in line at the market with cloth bags，am I doing any good？Does my walking to stores make any real difference to the world?I recently learned something about flamingos(火烈鸟)which like to get together in groups of a thousand or more.Every year，when the time comes for migration(迁徙)，a few of them first take off from the lake.But none of the others seem to notice，so the small group returns.However，the next day they try again.This time a few more fly along with them，but most of them still pay no attention，so they return again.They try for several times.Every time a few more birds join in but，since the thousands of others still take no notice，the great migration plan is once more stopped.Then one day something changes.The same small group of birds once again starts flying and a small number more join in just as before，then more.Finally，they all take flight and the migration really begins.What a spectacular sight it must be—thousands of flamingos taking off into the sky at once!A few can make a difference.Even if you're the one to take the first step，and continue trying，others will someday take notice and together we will solve even our greatest problems. 1．Where would you most probably read this passage?A．A guidebook. B．A movie poster.C．A personal blog(博客). D．A geology(地质)magazine.2．Why does the writer use cloth bags in stores?A．Because he wants to do some good to the environment.B．Because he thinks plastic bags are more expensive.C．Because there are only cloth bags in stores.D．Because all the people use cloth bags in stores.3．What does the underlined word “spectacular” in Paragraph 5 probably mean? A．Frustrating. B．Surprising.C．Terrible. D．Fantastic.4．Which of the following is TRUE according to the passage?A．Even if we can walk there，we still drive over.B．Flamingos like to get together in groups of a thousand or more.C．Brown clouds and polluted water are the only problems we face today.D．When a few of the flamingos first take off from the lake，all the others follow at once. 5．What's the writer's purpose of writing this article?A．To show that the writer loves to see the migration of flamingos.B．To tell readers to continue trying and it can make a difference.C．To introduce a special kind of flamingo to readers.D．To show that there're many problems in the world.参考答案1．C 解析：A项表示“旅行指南”；B项表示“电影海报”；C项表示“个人博客”；D项表示“地质杂志”。

【K12教育学习资料】2018年九年级英语全册Unit13We’retryingtosavethee

第三节语法填空阅读下面短文，写出括号内单词的正确形式或填入适当的内容(不多于3个单词)，将答案写在短文后的答题处。

AMy uncle lives in New York City.His hobby is 1 ．Every summer he 2 (go)fishing in the Adirondack Mountains.One day this summer，he took me to one of the beautiful 3 (lake)there.My uncle caught some big fish， 4 I didn't catch any.He said，“When I was a child，I used to 5 (catch)a lot of fish here.But now there aren't a lot of fish.In some of the la kes there aren't fish at all.”Then one day I read an article 6 acid rain(酸雨)in a magazine.I learned many things.Gases from factories and cars go into the air，and the wind carries 7 (they)a long way. 8 (late)they are mixed with the water in clouds，and this causes acid rain.Fish eggs and young fish 9 (kill)by even a little acid in the water.Today there are no fish in about 200 lakes in the Adirondacks.I really think all of us should work together 10 (stop)acid rain.1．__________ 2.__________ 3.__________ 4.__________ 5.__________6．__________ 7.__________ 8.__________ 9.__________ 10.__________BThere are many ways to save the environment if you would like.In this passage，you can find some ways.Plant more trees.Choose a right ground near your house or workplace.Unless there's any rule stopping you 1 (grow)trees in that area，go ahead and grow trees.Plant a tree every month and encourage your friends and classmates 2 (join)you.Have more and more trees 3 (plant)and there will come a day when you have green land thanks to your hard work.Walk more and drive 4 (little)．Choose to walk rather 5 drive your car.Walk or ride a bicycle to work if it's not very far.Not only cycling but 6 (walk)is good exercise.And each time you avoid using your car，you're doing something 7 (help)to cut down air pollution.You are saving fuel，saving money and keeping fit as well.Save water.Water is very important for living things.It's we who use and pollute it.The simplest way 8 (save)water is turning off water taps after we use them.When you visit a beach，make sure that you don't throw waste around.Do not pollute rivers 9 dropping garbage or other waste.Water is so precious， 10 we can't waste or pollute it.1．__________ 2.__________ 3.__________ 4.__________ 5.__________6．__________ 7.__________ 8.__________ 9.__________ 10.__________参考答案A1．fishing 解析：由下文“Every summer he. . . fishing in the Adirondack Mountains. ”可推断，“钓鱼”是他的爱好，故填fishing。

【配套K12】2018年九年级英语全册Unit13We’retryingtosavetheearth

最新K12教育教案试题第八节书面表达一次性筷子(oneoff chopsticks)的发明，为人们的日常生活带来了许多便利。

但是随着使用量的增加，它也耗费大量的森林资源，同时对环境也造成了污染。

所以，我们国家逐渐禁止使用一次性筷子。

但；2．时态正确，前后连贯；3．不少于80词，开头已经给出，不计入总词数。

Oneoff chopsticks are very popular，but now________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________参考答案Oneoff chopsticks are very popular，but now using them has some problems.Some people think we shouldn't use oneoff chopsticks any more. On one hand，we need t o use a lot of wood to make them. On the other hand，they pollute environment after we use them. What's worse，many oneoff chopsticks are not clean enough for people to use. They are bad for our health.But others think we should keep using oneoff chopsticks. Because it is very convenient to use them. Next，it is much cleaner and healthier to use them than the traditional chopsticks which can be used and washed again and again. And it is helpful to save some water because we don't need to wash them after using.In my opinion，I think we should use fewer oneoff chopsticks so that we can save more trees. And we should also use clean chopsticks to keep healthy.。

[配套K12]2018届九年级英语全册《Unit 13 We’re trying to save t

Unit 13 We are trying to save the earth!Section B (1a—1e)Ⅰ.单项选择。

1.—This is really ________ ugly bird.—But it is ________ useful bird. It can help fishermen catch fish.A. an；a B．an；an C．a；a D．a；an2.Recycling is good，so don’t ________ bottles or newspapers.A．find out B．hand in C．use up D．throw away3.—Why haven't you bought a car，Mr.Lin？You can ________ one.—Well，I have money for it，but I want to go green.A．offer B．afford C．avoid D．allow4.—Now people have to pay some money for ________ bags in supermarkets.—Yes. Because they are bad for the environment.A．bin B．paper C．cloth D．plastic5. We should try our best to solve pollution problems ________ complaining them. A．rather than B．instead of C．for D．or6.—Everyone should use both sides of paper.—Yes. If we all use both sides of paper, many trees ________ be saved.A．need B．have to C．can D．must7.—Do you often use paper napkins?—Seldom，________ they are cheap and easy to get.A．since B．although C．because D．if8.—D on’t keep the water running while brushing your teeth.—Sorry. I forgot to ________.A．turn on it B．turn it on C．turn off it D．turn it off9.—How shall we go to the airport?—Let’s take the airport bus. It ______ only 20 minutes and ______ much less than taking a taxi.A．takes；costs B．spends；spends C．spends；costs D．takes；spends10.—There is often so much rubbish in the river.—Yes. Luckily，to save water, many actions ________.A．are taking B．are going to takeC．are going to be taken D．are going to be taking11.—Do you know what the clothes on the show are made of?—Waste paper. You see, waste things can ________ to life.A．bring back B．be brought back C．take away D．be taken away12.—There ________ lots of trees in the area.—But they have all gone because people built a railway here.A．have been B．used to be C．have had D．used to have13.If everyone takes good action，it will ________ a better future.A．has B．lead to C．led to D．be had14. Which of the following actions is NOT part of green life?A．Burning rubbish in the open air.B．Planting trees in spring.C．Walking or riding bikes to school.D．Taking a shopping basket when going shopping.15. —I think the biggest environmental problem in my country is air pollution.—________.The air here is much more polluted than in my country.A．Not really B．Me，too C．Yes，I agree D．It doesn’t matterⅡ.阅读理解。

[K12学习]2018届九年级英语全册Unit13We’retryingtosavetheearth第5课时当堂达标题新版人教新目标版

Unit 13 We are trying to save the earth!Section B (2a—2e)Ⅰ.单项选择。

1. Stop making so much noise. It is to the sleeping children.A. comfortableB. relaxedC. harmfulD. useful2. Today, we have many other to pay besides coins or paper money.A. excusesB. methodsC. chancesD. plans3. In the past, my grandpa cut trees and cut them for firewood.A. down; upB. up; downC. out; upD. off; down4. — How much is your coat?— Oh, it me 100 yuan.A. costB. spentC. paidD. took5. I hope everyone can care about the environment and stop things.A. protecting; wastingB. protecting; to wasteC. protect; wastingD. protect; to waste6. — The classroom is so bright now. You should the lights.—OK. I will.A. turn onB. turn upC. turn downD. turn off7. Every year, more than 70,000,000 sharks for their fins(鱼翅).A. were killedB. have killedC. are killedD. will kill8. Be quiet! The students a physics test in the next room.A. hadB. have hadC. were havingD. are having9. — You can hardly imagine the pleasure of talking on the WeChat(微信).— Really? But it cause you much trouble if somebody gets your personal information.A. mayB. needC. has toD. had to10. — Would you mind not throwing waste here? — .A. Sorry, I won’t do it againB. Sure, I’d love toC. Yes, of courseD. No, thanksⅡ.阅读理解。

K12推荐学习2018年九年级英语全册 Unit 13 We’re trying to save t

第四节短文改错假定英语课上老师要求同桌之间交换修改作文，请你修改同桌写的以下作文。

文中共有10处语言错误，每句中最多有两处。

错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号(∧)，并在其下面写出该增加的词。

删除：把多余的词用斜线(\)划掉。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；2．只允许修改10处，多者(从第11处起)不计分。

AMany have heard shark fin soup.This famous and expensive dish is especially popular in southern China.But do you realize that you're killing a whole shark each time you enjoy a bowl of shark fin soup?When people catch sharks，they cut off their fins and throw the shark back the ocean.Without a fin，a shark can no longer swim and slowly die.This is not only cruel，but also harmful to the environment.Sharks are the top of the food cha in in the ocean's ecosystem.If their numbers drop too low，it will bring danger to all ocean life.Many believe that sharks can never be endangered because they are the strongest at their food chain.But in fact，around 70 million sharks are caught and traded in this industry every year.Th e numbers of some kinds of sharks have falled by over 90 percent in the last 20 to 30 years.Environment protection groups around the world，such as WildAid and the WWF，are teaching the public about “finning”．They have even asked governments to develop laws stop the sale of shark fin s.So far，no scientific studies shows that shark fins are good for healthy，so why eat them？Help save the shark s!BRethink，Reuse，Recycle!Do you often throw away things you don't need anymore？Have you ever thought about how these things can actually be put to good use？Nothing is a waste if you have a creative mind.You have probably never heard of Amy Hayes，but she is a unusual woman.She lives in a house in the UK that she built herself out of rubbish.The windows and doors come from old buildings around her town that was pulled down.The top of the house is an old boat turned upside down.And the gate in front of her house is made from rocks and old glass bottles.Amy recently won a prize from the Help Save Our Planet Society.The president said，“Amy is an inspiration to us all.”Amy isn't the only one who is good in recycling.Jessica Wong from Hong Kong uses old clothes that people don't wear anymore make bags.She has been doing this for a few years now.She opened a small shop where she sells her bags，and she has also set up a website to sell them online.She especially likes to use old jeans make handbags.Her bags are cute and useful.“I plan to wri te a book about new ways to use old clothes，” she said.“I hope people can read my book and enjoy it！”Wang Tao sets up a small business in Shanghai four years ago.He is known as using iron and other materials from old cars to make beautiful art pieces.Some are large pieces th at look like animals or humans，and some are smaller pieces you can put in home.The more popular works can eve n be see in art shops around the city.Wang Tao hopes to set up a “metal art”theme park to show people the importance of environmental protection.Not only can the art bring happiness to others，but it also shows that even cold，hard iron can be brought back to life with a little creativity.参考答案。

小初高学习2018届九年级英语全册Unit13We’retryingtosavetheearth第2

Unit 13 We are trying to save the earth!Section A (3a—3b)Ⅰ.单项选择。

1. — May I borrow your CD player?— Sorry, I__________it myself.A. am usingB. usedC. have usedD. use2. Miss Lin__________a lot of work for the poor area since 2010.A. doesB. didC. has doneD. will do3. The club__________by a group of teenagers.A. organizeB. organizedC. is organizedD. are organized4. —“Frog”, Mo Yan’s latest novel, please!—Sorry, it__________just now. But it will come out again soon.A. sold outB. is sold outC. has sold outD. was sold out5. Yao Ming used__________basketball in NBA.A. playB. to playC. playingD. played6. — Must I hand in my homework now?— No, you__________. You can do it tomorrow.A. must n’tB. don’t have toC. shouldn’tD. can’t7. The teacher made the boy__________the sentence five times after school.A. to writeB. writeC. wroteD. written8. — Kevin, is your twin brother the same as you?—No, I’m__________than him.A. a little thinB. very thinnerC. much thinnerD. a little thinner9. — __________ fast the time flies!—Yes, we’ll leave school in a month. Let's study harder.A. What aB. How aC. HowD. What10. — Do you prefer classical music__________pop music?— Pop music, I think.A. toB. orC. thanD. for11. These days, it’s not easy for Chinese people to afford__________a flat.A. buyingB. buyC. buysD. to buy12. — The shirt looks nice on you! How much does it__________?— I just __________ten dollars for it.A. take; affordedB. cost; paidC. cost; spentD. take; spent13. — Shall we __________the meeting?—Sure. Let’s__________them.A. join in; join inB. join; joinC. join; join inD. join in; join14. — The light in the office is still on.— Oh, I forgot to__________.A. turn it offB. turn it onC. turn it upD. turn it down15. __________helps us a lot to protect the environment.A. Buying old thingsB. Making cheap thingsC. Recycling thingsD. Using cheap thingsⅡ.根据句意和单词的首字母填空。

[k12精品]2018届九年级英语全册Unit13We’retryingtosavetheearth第1课时学案新版人教新目标版

Unit 13 We’re trying to save the earth!Section A (1a—2d)【学习目标】1. 学习并掌握下列单词：litter, bottom, fisherman, coal, public, ugly, advantage, cost,wooden, plastic2. 能正确使用以下常用表达：the bottom of, be full of, used to do sth., play a part in doing sth., clean it up, be badly polluted, too much rubbish and waste, turn…into , cut down, take the bus or subway, instead of, remember to do sth., make a difference, lead to3. 能熟练掌握并使用下列重点句式：1) Even the bottom of the river was full of rubbish.2) It used to be so clean!3) Everyone in this town should play a part in cleaning it up!4) The air has become really polluted around here. I’m really getting worried.5) To cut down air pollution, we should take the bus or subway instead of driving.6) Our actions can make a difference and lead to a better future!【重点难点】·Talk about pollution and environmental protection.·Use what we have learned to talk about pollution and environmental protection.【新知预习】I. 根据句意及词首字母完成单词。

精品学习2018届九年级英语全册Unit13We’retryingtosavetheearth第2课

Unit 13 We are trying to save the earth!Section A (3a—3b)Ⅰ.单项选择。

【配套K12】[学习]九年级英语全册 Unit 13 We’re trying to save th

Unit 13 We’re trying to save the earthSection B(1a-1e)一、根据句意及首字母提示完成单词1.We should try to r all the reusable things.2.It’s a good habit to t off the light when leaving the house.3.We are supposed to r bikes to work as much as possible.4.I never use paper n while eating.5.We have already s using plastic bags when shopping.二、单项选择1.This kind of knives metal and wood.A.are made up ofB.is made ofC.are made fromD.is made2.Basketball is so popular a game in the world that people play it for fun and exercise.lion oflions oflionsD.two millions of3.Don’t while eating.It can make a difference to save our earth.A.have vegetablese paper napkinsC.have fruitse forks4.To protect the environment,people are supposed to some waste things.A.receiveB.recycleC.reflectD.review5.The shower is still on.Please go to .A.turn off themB.turn them offC.turn off itD.turn it off三、补全对话,每空一词A:Hi,Mike!How did you get here?B:By train.A:Did you 1.e your train trip?B:Yes,but one thing annoyed me.A:What 2.h ?B:On the train,I found a woman 3.e bananas.After eating,she 4.tthe banana skins away.A:What did you do then?B:I told her what she had done was not right.A:Yes,you were right.To 5.s with,it would pollute theenvironment.Secondly,the banana skins could make it 6.e for people to fall down.B:I agree with you.A:What did she do 7.t ?B:She didn’t take my words 8.s at all.A:No wonder you are so 9.a .Everyone should do something to take 10.c of the environment.知能演练·提升一、1.recycle 2.turn 3.ride 4.napkins5.stopped二、1.B 2.B 3.B 4.B 5.D三、1.enjoy 2.happened 3.eating 4.threw 5.start 6.easy 7.then 8.seriously9.angry/annoyed 10.care。

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Unit 13 We’re trying to save the earth!Section A (Grammar focus—4b)【学习目标】1. 学习并掌握新词汇：reusable, afford, transportation2. 学习并会用以下常用表达：try to do sth., used to do sth., is/are doing, be considered,take part in; play a part in doing sth., help with, help out, turn off, instead of, pay for, add up, afford to do sth., not …any longer, take action, It’s difficult for sb.to do sth.3. 学习并掌握下列句型：1) We’re trying to save the earth.2) The river used to be so clean.3) It was considered the nicest river in town.4) The air has become really polluted.5) We should help save the sharks.6) Everyone should play a part in keeping the city clean.7) You can save electricity by turning off the lights when you leave a room.8) We cannot afford to wait any longer before taking action!9) It’s difficult for parents with young children to use public transportation【重点难点】正确使用本课语法要点。

【新知预习】根据句意和首字母提示完成单词。

1. It was c________ the nicest river in town.2. You can also use paper or r_______ bags instead of plastic bags.3. We cannot a_______ to wait any longer before taking action!4. We think that everyone should use public t________.5. I guess everyone in this city is trying to improve the e_________.【课堂探究】一、现在进行时：概念：表示现阶段或说话时正在进行的动作及行为。

时间状语：now, at this time, these days, etc. 基本结构：am/is/are+doing 否定形式：am/is/are+not+doing. 一般疑问句：把be动词放于句首。

二、used to的意思是“过去经常”，其中的to是不定式符号，不是介词，所以其后接动词原形(不接动名词)。

三、现在完成时：概念：过去发生或已经完成的动作对现在造成的影响或结果，或从过去已经开始，持续到现在的动作或状态。

时间状语：recently, lately, since…for…,in the past few years, etc. 基本结构：have/has + done 否定形式：have/has + not +done.四、被动语态：概念：当主语为动作的承受者时，谓语要用被动语态。

基本机构：“助动词be＋及物动词的过去分词”构成。

含有情态动词的被动语态由“情态动词＋be＋及物动词的过去分词”构成。

助动词be有人称、数和时态的变化，其变化规则与be作为连系动词时完全一样。

五、情态动词should后接动词原形。

（1）表示“应该，应当” You should help your mother with the housework. 你应该帮你母亲做家务。

（2）表示“可能，该(=will probably) ”He should arrive soon他可能很快就到了。

【达标练习】I. 单项选择。

( ) 1. We’re trying ______ the earth.A. to saveB. savingC. savedD. be saved( ) 2. My good friend becomes good at __________English every day.A. speakB. speakingC. speaksD. to speak( ) 3. I _________ take dance lessons, but I don’t anymore now.A. used toB. usedC. usingD. to use to( ) 4. It was ________the nicest river in town.A. consideringB. consideredC. have consideredD. to be considered ( ) 5. When it comes to ________ the earth, people may think that big things should be done.A. saveB. be savedC. savedD. savingII. 用所给单词的适当形式填空。

1. —_______ you ever_______ (take) part in an environmental project?—Yes, I have.2. I’ve become much _______ (good) at speaking English.3. The air has become really_______ (pollute).4. Everyone should _______ (play) a part in keeping the city clean.5. I guess everyone in this city is_______ (try) to improve the environment.6. You can save electricity by _______ (turn) off the lights when you leave a room.7. We cannot afford to_______ (wait) any longer before taking action!8. I_______ (help) with a Clean-Up Day last year.III. 根据所给汉语完成英语句子。

1. 这条河过去很干净。

The river _______ _______ _______ so clean.2. 我们应该帮助拯救鲨鱼。

We should _______ _______ the sharks.3. 然而，很多人忘记了拯救地球从小事做起。

However, many forget that saving the earth_______ _______ small things.4. 在很多商店，你不得不付塑料袋的费用In some stores, you now have to _______ _______ plastic bags.5. 我们认为每个人都应该使用公共交通工具。

We think that everyone should use ________ ________.6. 所有这些小的事情加起来变成能改善环境的大的事情。

All these small things can _______ _______ and become big things that would ________ _______ ________.7. 我们已经看到环境方面的很多变化。

We ________ _________ _________ _________ in the environment.8. 空气污染变得越来越糟糕了。

The air pollution is _________ _________ _________ _________.9. 这条河被工厂污染了。

The river_________ _________ by factories.10.人们应该多乘坐公共交通工具。

People should________ ________ _________ more.●Time, Time again, I ask myself （请写出这节课你的收获，完成下面的反思）【学后反思】九年级英语第13单元学案参考答案及解析第三课时【新知预习】1. considered2. reusable3. afford4. transportation5. environment （解析略）【达标练习】I.1.A try to do sth. 尽力干某事。

2.B be good at doing sth擅长做某事。

3.A used to do sth.过去常常干某事。

4.B 主语和谓语动词之间是被动关系。

5.D 介词后边跟动名词。

II.1.Have taken 根据回答，确定用现在完成时态。

2. better much修饰比较级的考察。

3. polluted 被污染。

4. play 情态动词后加动词原形。

5. trying 现在进行时态的考察。

6. turning 介词后跟动词的现在分词形式。

7. wait afford to do 支付做某事的花费。

8.helped 由last year，可知用一般过去时。

III. 1. used to be 2. help save 3. begins with 4. pay for 5. public transportation 6. add up; improve the environment 7. have seen many changes 8. getting worse and worse9. is polluted 10. take public transportation。

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