英语选修8第二单元using language 导学案
人教版高中英语选修8 Unit2_Using_language_优质导学案
Unit2 Using language优质导学案Teaching aim:掌握科普文章的阅读方法Teaching key points and difficulty动名词的复合结构学习过程：Step 1: Choose the best answer after reading.1.The film Jurassic Park is popular because _____.A. people are interested in the subject of cloningB. all the actors are dinosaursC. it was directed by a scientist who clones dinosaursD. it proves very interesting2.The writer of the text_____A. is excited by the possibility of cloning fierce and extinct animalsB. believes that extinct animals can be brought back to life by cloningC. thinks it impossible or unsuitable to clone extinct animals like dinosaursD. dreams of dinosaurs returning to the earth3. We can infer from the text that____A. scientists are experimenting to clone dinosaursB. dinosaurs will never return to the earthC. cloned animals will only live in the zooD. the DNA of dinosaurs can only survive 10 000 yearStep 2:Read the text, then tell the following sentences are true or false.1.Scientists are still experimenting with cloning mammals because they think it can make money.2.The animals that have disappeared from the earth, like dinosaurs, can be brought back to life through cloning.3.If we can clone any extinct animals, we should let them live in a zoo.Step 3:Give some reasons why it is either impossible or unsuitable to clone extinct animalsReason 1:Reason 2:Reason 3:Step 4:Diversity in a group of cloned animals Advantage of diversityDisadvantage of diversity。
Unit 2 Using Language 教学设计-公开课-优质课(人教选修8精品)
Unit 2 Using Language 教学案擦(火柴)；突然袭击n. 罢工常用结构：strike… into one’s heart使……刻苦铭心An idea struck (occur to) me. 我突然想起一个主意。
go/ be on strike 举行/ 在罢工It strikes me that...我觉得……；我的印象是……活学巧用(1) The workers __________because they wanted more money.工人们在罢工，因为他们要求增加工资。
(2) When the clock ____________，the strike started.当钟敲响了五点，罢工开始了。
(3)____________________ none of them trusts each other.他们当中没有一个人信赖对方这使我震惊。
(4) Great damage has been caused by the tornado which ______ the area last week.上周侵袭这一地区的龙卷风造成了巨大的损失。
2. from time to time 不时；偶尔= now and then/ at times/ once in a while/ sometimes/ occasionally 偶尔联想拓展：at one time 曾经at a time 每次；一次for the time being 暂时in no time 立刻at no time 决不in time 及时；迟早on time 准时all the time 一直3. bring … back to life vt. 使……复生；使……复活联想拓展：come back to life vi. 复活bring in 引进；吸收bring up 培养；教育；提出；呕吐bring out 出版(come out) bring back 使回想起；归还bring down 降低；减少4. resist vt. 抵抗；对抗resist doing sth. 抵抗、抵制做某事常用结构：resist sth. 抵制；阻挡某事resist doing sth. 反对做某事can’t resist doing sth. 忍不住做某事be resistant to sb./sth. 对某人/某事有抵抗力即学即练短语填空:①She_______ hardly _______ _______。
高中英语U2Usinglanguage学案新人教版选修8(20201221182628)
Un it 2 Clo ningPeriod 4 Using Ian guageTeach ing Aims:1. 掌握以下单词和短语的拼写和用法：strike ...into one's heart 、from time to time bring back to life 、in vain 、resist 、merely、initial2. 通过运用略读和扫读两种阅读方法完成阅读任务；3. 通过本节课的学习，增进学生对克隆技术的了解，培养学生对科学的兴趣。
Step 1 Lead ing inLook at the following pictures and think which film they are from.Do you like dino saurs? Can you see them in our real life? Why?Step 2 Readi ngTask 1 Skimmi ng （match the main idea with each paragraph）Part 1 A. Reas ons for not cloningPart 2 B. Possibility of clo ningPart 3 C. History of clo ningPart 4 D. Conclusion（结论）Task 2 ScanningTask 3 Choose the best an swer :1. The film Jurassic Park is popular because ______ .[Part 1]A. people are in terested in the subject of clo ning ext inct an imalsB. all the actors are dino saursC. it was directed by a scie ntist who clones dino saursD. it proves very in teresti ng2. Which of the following is true?[Part 2]A. Mice were cloned in 1981.B. Dolly the sheep was the first cloned ani mal.C. The n ame of the cloned cow is “ Bis on ” .D. China was successful in cloning mammals.3. The writer of the text ___ .[Part 3]A. is excited by the possibility of cloning fierce（凶猛的）and extinct animalsB. believes that extinct animals can be brought back to life by cloningC. thinks it either impossible or un suitable to clone ext inct ani malsD. dreams of dino saurs retur ning to the earth4. We can infer（推断）from the text that ___ .[Part 4]A. scientists are experimenting to clone dinosaursB. dino saurs will n ever retur n to the earthC. cloned ani mals will only live in the zooD. the DNA of din osaurs can only survive 10,000 yearsStep 3 Lan guage Points1. strike vt. & vi. 打；撞击；罢工n. 罢工【用法归纳】【”不时，偶尔”的多种表达方式】你还记得有关time的常用习语吗?【bri ng短语归纳】【单词积累】Step 4 Game TimeLet' s play a game. Which is the best group?Step 5 PracticeFill in the bla nks with the phrases give n.1. Our teacher _____ the importanee of safety __________________ , so we were all carefulwhe n cross ing the street.2. My uncle comes to have dinner with us _______________ .3. I'm afraid that your efforts are______ ; he would n't liste n to others.4. His mother died last year. He wished he could ___her __________ .Step 6 Homework1. Review the words and Ian guage poi nts we have lear ned in this class.2. Read more articles about cloning and the natural world.Read ing comprehe nsion:Research adva nces over the past decade have told us that, with a little work, wehuma n can clone just about any thi ng we want, from frogs to mon keys and probably eve n ourselves! So, we can clone things, but why would we want to?Of all the reas ons, cloning for medical purposes has the most pote ntial to ben efitlarge nu mbers of people. How might cloning be used in medici ne?1. Cloning ani mal models of diseaseMuch of what researchers learn about humandisease comes from studying animal models such as mice. Often, ani mal models are gen etically engin eered to carry disease-caus ing mutati ons（变异）in their gen es. Creati ng these tran sge nic（转基因的）animals is a time-intensive process that requires trial-and-error and several gen erati ons of breedi ng （培育）.Cloning tech no logies might reduce the time n eeded to make a transgenic animal model, and the result would be a population of genetically iden tical ani mals for study.2. Cloning stem cells（干纟田胞）for the treatment of diseasesStem cells are the body's building blocks, responsible for developing and repairingthe body throughout life. As a result, they might be used to repair damaged or diseased organs and tissues. Researchers are currently looking up cloning as a wayto create certa in huma n stem cells for the research of diseases.3. Cloning farm ani mals for drug producti onFarm animals such as cows, sheep and goats are currently being genetically engineeredto produce drugs or proteins that are useful in medicine. Just like creating animalmodels of disease, cloning might be a faster way to produce large herds of genetically engin eered ani mals.1. From Purpose One, we can infer that ___ .A. most transgenic animals are cloneB. most animals carry engineered genesC. most transgenic animal models are not clonedD. most animals carry disease-causing mutations in their genes2. It can be lear ned from Purpose Two that cloning tech no logies can be mainly usedto ___ .A. create damaged or diseased organs and tissuesB. clone genetically defined human stem cellsC. develop and maintain the bodyD. repair the body throughout life3. Accord ing to Purpose Three, cloning tech no logies can be mainly used to _A. speed up the producing of genetically engineered animalsB. produce drugs or proteins that are useful in medicineC. raise genetically engineered cows, sheep and goatsD. produce large herds of animals for human beings。
Unit 2《Cloning 》Using language 导学案-人教选修8精品
Unit 2《Cloning 》Using language 导学案【要达成的目标】Improve students’ reading skills.【“教”与“学”过程】本堂课使用的电教手段Step I Individual work before class Free talk1. Do you know dinosaurs？Where have you seen them？Can you see them in our real life？Why？2.Do you think it is possible to clone dinosaurs？If yes，do you think that’s good for human beings？Why？Step II Group work in class.1. What animals have people cloned？2. Can we really clone dinosaurs now？3. When did dinosaurs disappear from the earth？Step III Individual work in class.Fast reading Tell True (T) or False (F).1. Scientists are still experimenting with cloning mammals because they think it can make money. ( )2.The animals that have disappeared from the earth，like dinosaurs，can be brought back to life through cloning. ( )3.If we can clone any extinct animals，we should let them live in a zoo. ( ) Step IV Group work in class.Read the passage again，and choose the correct answer.1. The writer of the text _____.A. is excited by the possibility of cloning fierce and extinct animalsB. believes that extinct animals can be brought back to life by cloningC. thinks it impossible or unsuitable to clone extinct animals like dinosaursD. dreams of dinosaurs returning to the earth2. Which of the following is true？A. Mice were cloned in 1983.B. Dolly the sheep was the first cloned animal.C. The name of the cloned cow is “Bison”D. China was successful in cloning twin calves.3. The reasons why a group of cloned animals all die of the same illnessdo NOT include ____. A. they have the same arrangement of genesB. there isn’t enough diversity in the group for it to overcome illnessesC. the illness is a new oneD. their arrangement of genes can not resist that new disease4. We can infer from the text that ____.A. scientists are experimenting to clone dinosaursB. dinosaurs will never return to the earthC. cloned animals will only live in the zooD. the DNA of dinosaurs can only survive 10，000 yearLanguage points1. strike v. 打，撞，罢工；给...以印象He was struck by lightning.The clock struck twelve.The girl struck a match to light a cigarette.The union struck for better work conditions.That play struck me as silly.strike … into one’s heart 使…刻骨铭心2. Bring … back to life 使苏醒；使活泼；使生动He wanted to be a highly skilled doctor who would be able to bring the dying back to life. bring back to health 恢复健康bring back to one's mind 使回想起bring back memories 回忆起bring back to earth 使...从幻想中清醒过来3.in vain 徒然，白费，无效All our work was in vain.They tried their best to make her happy but in vain.vain adj. 徒劳的；无效益的；自负的；爱虚荣的a vain attempt 徒劳的尝试a vain girl 虚荣心强的女孩子He is vain of his speech.他对自己的发言很得意。
Unit 2 Cloning III Using Language 导学案-人教选修8精品
Unit 2 III Using Language 导学案Step 1 Vocabulary：Preview the new words and phrases of this text.1.___________ 使...刻骨铭心2. 分娩3. 不时；偶尔4. 徒劳5. 将某物传递给某人6. _________________死于7. _________________注定8 . __________________过着...的生活9. ____________________以...为基础10. _________________ 弄清楚Step 2 Warming up1. Do you know dinosaurs？Where have you seen them？Can you see them in our real life？Why？2. Do you think it is possible to clone dinosaurs？If yes，do you think that’s good for human beings？Why？探究案Step3 Reading Task 1: Fast readingDo the author believe the dinosaurs can return to the earth？Task 2: Careful readingGive some reasons why it is either impossible or unsuitable to clone extinct animals.Reason 1: ________________ is needed.Reason 2: There is not enough ________ in the group to _________________.Reason 3: A (n) ______________ would be needed for the cloned extinct animals.Task 3. ComprehendingAnswer the following questions:1. Why shouldn’t you clone an extinct animal if there isn’t enough diversity in the group？______________________________________________________________________________.2. Why is it wrong to clone an extinct animal if it would have to live in a zoo？_________________________________________________________________________.3. Why can’t you clone the DNA of animals that have been extinct longer than 10，000 years？_________________________________________________________________________.训练案Task 4 Exploring 1.Choose synonyms(选择同义词)1. It proves how the idea struck a mixture of fear and excitement into people’s hearts.A. Have on the brainB. ConfusedC. Droved people crazyD. Scared2. From time to time people suggest that extinct animals…A. There was a time whenB. OccasionallyC. All the timeD. Each time3. People suggest that dinosaurs，can possibly be brought back to life.A. Kept upB. resistC. live onD. relived4. The initial requirement is that you need perfect DNA.A. Most thankfulB. most pressingC. most difficultD. original and basic5. All efforts of cloning an animal will be in vain if there is not enough diversity.A. Go to wasteB. uselessC. helplessD. meaningless6. Others will pass on the ability to resist that disease.A. opposeB. slideC. hireD. indicate7. The chance of dinosaurs ever returning to the earth is merely a dream.A. onlyB. surelyC. abruptlyD. miserably2. Read the text again，find out the sentences and analyze them. (重点、长难句分析)1. 【原句再现】The popularity of the film Jurassic Park，in which a scientist clones several different kinds of extinct dinosaurs，proves how interested ordinary people are in the subject. 译：_________________________________________________________________________. [句式透析]in which引导____________，修饰_______。
高中英语 Book8 Unit2单元导学案 新人教版选修8
Book8 Unit2 Period 1 Reading内容简析本节课的内容是人民教育出版社出版的NSE高中教材选修8第二单元的Pre-reading, Reading, Comprehension 部分，本单元的话题是克隆。
本节课是单元的阅读课，教材的本单元内容，语言技能和语言知识都是围绕“克隆”这一中心话题设计的。
具体设涉及“什么是克隆”, “克隆羊多利是如何诞生的”，“克隆德利笔”等。
教师可在充分利用教材资源的基础上，结合学生的实际情况设计教学活动，旨在帮助学生有效地掌握阅读技巧，形成有效地学习方法和阅读策略，同时了解说明文篇章结构和写作特点，为下一步进行说明文的写作教学做好准备。
目标聚焦一、知识目标1、初步理解、掌握克隆意为无性繁殖，克隆技术即为无性繁殖技术。
学习课文中关于克隆这一新生物技术的有关知识，学习分析课文中的长难句子，初步感知课文中出现的的本单元要学的语法现象。
2、利用已获取的信息发表自己对进行人类克隆问题的看法。
3、克隆技术日新月异，在教授本单元时，需随时关注其发展的最新动态。
二、技能目标1、能理解文章主旨大意，获取信息、处理信息、进行推理判断和表达的能力。
2、形成分析篇章结构的能力，提升逻辑思维能力3、学会增加语言的输出量，提高语言表达能力。
三、策略目标1、通过图片和标题预测文章内容；运用略读和找读策略迅速获取信息,并能够精读文章获取信息和分析信息。
2、能利用上下文猜测生词词义。
（四）情感态度目标认识克隆人的危害———对人类在伦理、道德、法律等方面造成的巨大影响，应给予抵制。
方法运用1、整体教学法2、体裁教学法3、导、读、练的教学模式学习流程Before class (课前自主学习，合作探究)Task 1 Vocabulary（词汇预习）Preview the new words of this text.clone / commercial/ producer/ undertake/ arbitrary/ object/ forbid/ accumulate/ bother/ regulation/ resist/ unable/ argument/ reasonable/ obtain/cast down/ object to/ the media/ in favor of/ be bound to (do)-----/ from time to time/ bring back to/ pay off【设计意图】通过预习词汇为下一步的阅读扫清生词障碍。
Unit 2 Cloning Section II Learning about the language 导学案-人教选修8精品
Unit 2 language points导学案一、课前预习I. 重点短语1. 一定或注定(做)……________________________________2. 旁路；支线；岔道________________________________3. 以失败告终________________________________4. 对……满意________________________________5. 对……提出反对意见________________________________6. 服兵役________________________________7. 欠某人某物________________________________8. 因某事而向某人道歉________________________________9. 下定决心做某事________________________________10. 这只是时间问题(迟早的事)。
________________________________II. 完成句子：用上面的短语完成下列句子。
1. The Great Western Development _____________ be a bridge between China and the rest countries in the world.西部大开发必定成为沟通世界各国和中国的一座桥梁。
2. A car suddenly shot out of a ______________ and nearly hit me.有一辆汽车冷不防从岔道上冲出，险些撞着我。
3. You ________________ a holiday.你应该休息一天。
4. You should ___________________________ for being late.你应该就迟到这件事向老师道歉。
高中英语人教版选修8Unit2CloningLanguagepoints教案(系列三)
选修八Unit2 CloningPeriod2 Language points课前预习案Teaching aims: Learn how to use the new words1.differ vi. 相异，不同，意见分歧Think about how they differ.译：_________________________________________ differ from `````和····不同, differ greatly/widely 相差太大differ in 在····方面不同differ with `` on sth. 与···在···上持不同看法I differ with you on this matter. 关于此事，我和你意见不同。
My answer differs from yours. 我的答案与你的不同。
日语发音和法语大不相同。
____________________________________________________________________ 联想：be different from，difference.2 undertake (undertook, undertaken) It is a difficult task to undertake.（1）承担（工作，责任等），从事，着手担任I can undertake the responsibility for the changes.我愿意承接这项变革的责任。
（2）许诺，保证undertake to do sth. 许诺做某事、同意做某事undertake that 保证···翻译：He undertook to finish the job by Friday.___________________________________________________________________ 3. object 反对，拒绝，抗议，后跟to. 名词：物体，目标，对象We object to being treated like this.我们抗议受到如此的待遇。
人教版高中英语选修8教学设计：Using Language
Using LanguageTeaching goalsTarget languageUseful words and expressions: luggage, tram, apparently, slip, bakery, ferry, hire, seagull, immigration, team up with, mark out, take in, a great many.Teaching important and difficult points1.Improve the stu dents’ reading ability (skimming and scanning).2.enable the students to grasp the useful words and expressions.Teaching methodsReading, discussion, cooperative learningTeaching procedures:Step 1 Lead-in1.Look at George’s photos. Then quickly read George’s diary. Write the days he saw thesethings under the photos.2.Read George’s diary more slowly and answer the questions.1.Why did Andrew Hallidie invent the cable car system?2. Where did George eat lunch on his first day in San Francisco?3. Why did George hire a car? Why do you think he joined up with Terri and Peter?4. Name three things that visitors can do in Chinatown.5. What is Alcatraz Island famous for?3. Read George’s diary again. Put the mark”^” in the places where George has left out somewords. Discuss with others in your class: Why did George leave out some words when he wrote his diary?Step 2 Language points1.Team up with: make an effort in cooperation with; work together with与……协力从事,合作Translate:He teamed up with an experienced worker in the project.2.hire 解雇fire 租,雇佣1)You are _fired___, because you are so lazy for the work.2) I must ____hire_ a house when finding a job in the city.1)He had nowhere to live in, so we took him in.接纳2)The dress needs to be taken in.改小3)They listened to my lecture, but how much did they take in , I wonder?理解4)Don’t let yourself be taken in by these politicians.欺骗Take off 拆开,拆散Take on 贬低, 贬损名誉等Take apart 从事,对…..产生兴趣,打听,占用空间或时间Take away from 脱下,脱去,起居,休假,离开Take up 开始雇佣,露出,承担,接受Step 3 Pair work and consolidation.Make sentences with the new words learned in this lesson.Step 4 Homework1.Read the passage atain2.Prepare for the diction of the useful words and expressions of this unit3. Prepare for the writing of the next lesson.。
高中英语选修八第二单元M8U2 Using language
长句难句点拨
1. The popularity of the film Jurassic
Park, in which a scientist clones
several different kinds of extinct dinosaurs, proves how interested ordinary people are in the subject.
3. The reasons why a group of cloned animals all die of the same illness do NOT include____. A. they have the same arrangement of genes B. there isn’t enough diversity in the group for it to overcome illnesses C. the illness is a new one D. their arrangement of genes can not resist that new disease
Homework
Finish the relative exercises and review the key points in this unit.
4. Diversity in a group means having animals with their genes arranged in different ways. 群中的多样性指的是拥有基因排列 方式不同的动物。 with their genes arranged in different ways作定语, in different ways 以不 同的方式。
G2 G4 G8
高中英语 Unit 2 Cloning PartIV Using Language学案新人教版选修8
高中英语 Unit 2 Cloning PartIV Using Language学案新人教版选修8Using Language一、【学习目标】1、读懂文章大意，能根据文章内容作出判断和选择；2、掌握文中重要词组及相关句子。
二、【自主预习】I、 Fast reading: Read the text and answer the following questions、1、Why shouldn’t you clone an extinct animal if there isn’t enough diversity in the group?2、 Why is it wrong to clone an extinct animal if it would have to live in a zoo?3、Why can’t you clone the DNA of animals that have been extinct longer than10,000 years? II、 True or False1、Scientists are still experimenting with cloning mammals because they think it can make money、2、 The animals that have disappeared from the earth, like dinosaurs, can be brought back to life through cloning、3、 If we can clone any extinct animals, we should let them live in a zoo、III、 Multiple choices1、The writer of the text_____A、 is excited by the possibility of cloning fierce and extinct animalsB、 believes that extinct animals can be brought back to life by cloningC、 thinks it impossible or unsuitable to clone extinct animals like dinosaursD、 dreams of dinosaurs returning to the earth2、 The film Jurassic Park is popular because _____、A、 people are interested in the subject of cloningB、 all the actors are dinosaursC、 it was directed by a scientist who clones dinosaursD、 it proves very interesting3、 Which of the following is true? ____A、 Mice were cloned in1981、B、 Dolly the sheep was the first cloned animal、C、The name of the cloned cow is “Bison”D、 China was successful in cloning mammals、4、 The reasons why a group of cloned animals all die of the same illness do NOT include____、A、 they have the same arrangement of genesB、there isn’t enough diversity in the group for it to overcome illnessesC、 the illness is a new oneD、 their arrangement of genes can not resist that new disease5、 We can infer from the text that____A、 scientists are experimenting to clone dinosaursB、 dinosaurs will never return to the earthC、 cloned animals will only live in the zooD、 the DNA of dinosaurs can only survive10 000 year三、【基础知识】I、重点词组和短语（仔细阅读课文，你会发现他们的哟！）1、使……刻骨铭心2、这是因为3、生产,分娩,催生4、不时，偶尔5、使复生，使复活6、白费力气，枉费心机7、把……传递给下一代8、抵抗疾病的能力______________________9、过着自然的生活10、与…相似 (P17)11、状况/情况很好（坏）_____________________________________________________(P17)II、延伸拓展1、strike 敲打；罢工；打；突然袭击 n、罢工常用结构：strike… into one’s heart使……刻苦铭心An idea struck (occur to)me、我突然想起一个主意。
选修8 Unit2 语言点 导学案
Module 8 Unit2 Cloning(Revision) (A版)【学习目标】1. 掌握本单元高考考纲重点单词和短语。
2. 熟练应用本单元重点词汇及句型。
【学习重点】熟记本单元重点词汇及其用法:object, forbid, owe, pay off, in good condition,in favor of.【学习难点】灵活运用本单元重点词汇及句型。
第一部分预习案学法指导：请同学们根据本单元单词表及课文内容完成下列单词和短语。
A. 重点单词1. ______ n. 步骤；程序；手续2. ______ n.纠正;改正;修正3. ______ __ n.媒介；工具（复数形式）4. __ _____ n.规则；规章；法规5. _______ adj.商业的，贸易的6.____________ vi.退休；离开→adj.退休的______________7. vt.着手；从事；承担→p._____ →p.p_______________________8. _____ vt.禁止；不准→p. _____ →p.p______________________9. _ vi.不同，相异→adj.不同的_______________→n.不同，差异_________________10. ___vi不赞成；反对→n.反对；异议____ →adj；客观的；真实的_____________ B．重点短语1.raise a storm of objections_______________2. attain their ambitions____________________3. reform their legal systems________________4. have a great impact on ___________________5. 将……归功于……____________________6.旁路；支线；岔道__________________________7.使……刻骨铭心_________________________ 8. 适合于……的_______________________________9.一定或注定（做）____________________________ 10.使……复生；使……复活_______________________C.重点句型（翻译并背诵）1. The news that he was admitted to Peking University is exciting..2. What do you think is the most important in your life?3. Now comes my turn to make a speech.4. Away flew the bird.5. On the top of the mountain stands an old temple.6. He owes his success to hard work and practice.7. I owed you an apology. I shouldn’t have been rude to you.8. You are bound to succeed so long as you keep on trying.我的疑惑：_________________________________________________________________________第二部分探究案学法指导：请同学们根据高考复习资料《优化探究》P.172 --174中词汇及句型的用法，小组合作完成下列探究问题。
选修8 unit2 language points 2学案
选修8 Unit 2 Cloning-----language points 学、练案1.differ vi. 不同；相异differ from 与……不同differ with/from sb. about/on/over sth. 关于某事和某人不同differ in…在……方面不同拓展: tell the difference between A and B 辨别A与B之间的不同difference n.区别；差异make a difference (to) 有影响；区别对待make no difference 没影响，不起作用【活学巧用】例题1. The two sides in the dispute still differ _____ each other _____ the question of pay.A. on; withB. with; inC. at; withD. from; on例题2. You and me differ ______ personalities. 我和你性格不一样。
例题3. Jim differed ____ Mary _____ how to spend the coming holiday.对于如何度过即将来临的假期，Jim和Mary持有不同意见。
2. undertake (undertook/ undertaken) vt. 着手；从事；承担（bear/ assume/ take on）undertake to do sth. 同意、答应或着手做某事undertake for…为……负责= be responsible for/ answer forundertake that 保证……e.g. I can undertake that you will enjoy the trip.【活学巧用】例题4. As we are very busy these days, we might _____ the urgent work for the time being.A. agreeB. undertakeC. employD. charge例题5.他保证明天按时到。
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Unit 2 The Return of The Dinosaurs? 导学案
Learning aims: 1 to learn some useful words and
expressions and some information
about cloning
2 to improve reading ability
3 learn to love science and nature 课前自主预习
重点单词
1 no longer in existence ____________
2 a belief or feeling that sth. is true and that sth will happen although there is no proof ____________
3 the act of controlling or directng according to rule
_________
4 happening at the beginning:first __________
5 a disadvantage or problem that makes sth. a less attractive idea ______________
6 fair,practical and sensible________________
重点短语
1状况很好（坏）__________ 2 不时偶尔____________ 3 使复活 __________ 4 使……刻骨铭心__________ 5白费力气___________ 6 最初要求_______________
完成句子
1 scientists are still experimenting with cloning mamals.
要点提取：experiment with/on sth. 做实验
例句仿写：有人认为在动物身上做实验会引起不必要的痛苦。
Some people feel that __________________animals causes unnecessary suffering.
2 The desadvantage is tht if there is a new illness some of these animals may die, but others will survive and pass on the ability to resist that disease to the next generation.
要点提取：the disadvantage is that…其缺点是……
Pass on…to…把…...转交（递给，传给……）
例句仿写：骑自行上班的优势是我们能过低碳生活。
________________________we can live a low-carbon life.
看完那本事后请传给我。
__________the book______me when you have finished it 3 based on what we know now, you cannot clone animals
that have been extinct longer than 10,000 years. 要点提取：based on +what 引导宾语从句
例句仿写： ____________was shown on the survey,we can make a better understading about the thing
_______we have done to nature.
课堂互动探究
Task 1: Group Discussin: In fact, do you think there is any possibility that scientists bring extinct dinosaurs to life as a clone ? Why (not) ?
Task 2: Fast Reading
1 Match the main idea of each paragraph
Para1 explain the impossibility of cloning dinosaurs
Para2 conclude that it’s just a dream
Para3 introduce the topic of the passage 2 Which of the following is the author's attitude to cloning extinct animals?
The writer of the text_____
A. is excited by the possibility of cloning fierce and extinct animals.
B. believes that extinct animals can be brought back to life by cloning.
C. thinks it impossible or unsuitable to clone extinct animals like dinosaurs .
D. dreams of dinosaurs returning to the earth Task 2: careful-reading
1 Give some reasons why it is either impossible or unsuitable to clone extinct animals.
Reason 1: Perfect DNA is _______to obtain.
Reason 2: All the cloned animals have _________ arrangement of genes so that there is
_____________diversity in the group to overcome difficulties, which means they might die of
_________illness.
Reason 3: A lack of_______________
2 Based on what we know now, you cannot clone animals that have been extinct longer than_______ years.
3 The chance of dinosaurs returning to the earth is merely __________.
4 Why shouldn’t you clone an extinct animal unless there is enough diversity in the group?
5 Why can’t you clone the DNA of animals that
have been extinct longer than 10,000years?
After-reading
1 Discussion
Are you in favor of cloning extinct animals?
Now in pairs discuss which animals described
below are worth restoring by means of cloning. Choose one animal from the table on p16 and use
the information to help you argue why this animal should be restored to the earth.
2 write an short essay on what you have discussed.。