选修八 2.1Unit 2　Cloning.ppt

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1、新课标人教版课件系列,高中英语选修(模块）8-2.1,English SongEnglish ClassLanguage Data Bank,课时分配,Period 1&2 Warmingup and Reading I,Unit 2 Cloning,Period 1&2:幻灯片9-26页,Look at the following pictures and answer the questions:1.Its the most famous sheep in the world.Do you know how Dolly is different from other sheep?,Warm

2、ing up(5ms),She was cloned while the others were born naturally.It is the copy of another sheep.,2.What is cloning?,Cloning is a way of making an exact copy of another animal or plant.,3.Are the following clones the same?If not,what is the difference?,NO.The first four are man-made clones,the rest t

3、wo are natural clones.,In this class well learn a passage about cloning,but before we come to the text,can you guess how a clone is produced?,Pre-reading(3ms),The cloning of plants is simple and relatively easy.It can be done by taking cuttings(man-made cloning)or letting the plant produce its own r

4、unners(natural cloning).The cloning of animals is more complicated.It was not achieved until 1996 and is fully explained in the passage well learn today.,Reading I Scanning(5ms),Write the letter“T”if the statement is true.Write“F”if it is false.,1.Cloning means making a copy of an animal or a plant.

5、2.Gardeners can make a lot of money by cloning plants.3.Cloning animals is as complicated as cloning plants.,F,F,T,4.Dolly the sheep was the first successful clone of a mammal5.Natural clones happen in animals as will as in plants.,T,T,1.Dolly the sheep_.A.looked exactly like the sheep that provides

6、 the egg.B.was the exact copy of the sheep that provides the nucleus.C.looked like the sheep that gave birth to it.D.had the characteristics of all three sheep.,Reading II Skimming(5ms),Choose the right answer according to the text.,2.It can be inferred from the passage that a cloned animal_.A.usual

7、ly lives as long as the original one B.usually lives longer than the original one C.usually lives longer than the original one D.is usually as healthy as the original one,3.Which of the following is not an advantage of cloning?Cloning can be used for medical purposes.Large quantities of food can be

8、produced by cloning.Cloning can help keep animals from becoming extinct.Famous persons who have passed away can be cloned.,4.What is peoples fear about human cloning?Which of the following is wrong?Cloned Hitlers would do harm to the world.Cloned people may be killed at will for medical aid.A woman

9、would have difficulty recognizing her real husband.Men will die out because a woman can give birth to a baby without a husband.,Reading III Detail reading(8ms)Fill in the chart using the information from the text.,develop,the,illnesses,produce,cures,illnesses,die,younger,produce,plants,quality,for,s

10、ale,leader,useful,Evil,plant,species,moral,objections,endangered,animals,new,Reading IV Intensive reading(7ms),Read the letter again,then try to find the main idea of each paragraph.,1.Cloning is _ 2.Cloning has _ uses.3.The _ of Dolly.4.The _ of Dolly.5.It is _ to clone human beings.,a way of makin

11、g an exact copy of another animal and plant.,problems,two major,effect,forbidden,Practice discussion(8ms),Choose one of the following questions to discuss in groups.The leader of each group should write down every members opinion,then the volunteers will show your group work to the whole class:,Ques

12、tions:Do you support the idea of producing human embryos(胚胎)for medical purposes?Why?Do you think it a good idea to use cloned humans for organ(器官)transplants?Why?Do you think a cloned human should have human rights?Why?Do you think cloned humans will have the same talents as the original ones?Why?,

13、Assignment,Surf the Internet to find more information about cloning and you are expected to present it to your classmates in the next class.,Language points for reading I,Take a break!,Period 3 Learning about language,Unit 2 Cloning,Period 3:幻灯片27-48页,Checking answer I(2ms)Answer keys for Ex.1 on Pa

14、ge 13:,differcast downaccumulatedundertakeexactaltogether,Checking answer II(2ms)Answer keys for Ex.2 on Page 13:,mercial4.Are you in favour of,5.procedure6.I object7.will forbid,Checking answer III(3ms)Answer keys for Ex.3 on Page 13:,undertake2.controversial3.satisfaction,4.Cast down5.breakthrough

15、6.accumulate,Checking answer IV(2ms)Answer keys for Ex.4 on Page 14:,CFDEBA,Checking answer V(10ms)Answer keys for Ex.2(Translation)on Page 56(Workbook):,My rabbit gave birth to four exactly identical babies several days ago.From time to time we think that humans can use cloning to bring extinct ani

16、mals back to life.The plan to develop human clones is bound to raise controversial questions.Shortly after he retired,the old man wrote a novel about his childhood.,5.She is unable to speak aloud because she has just had an operation on her throat.6.Edward was much cast down by the news that he coul

17、dnt obtain the graduation certificate.7.His efforts paid off when the doctor saw the patient opened his eyes.8.The scientist made the assumption that there is no animal life on other plants.,Checking answer V(10ms)Answer keys for Ex.2(Translation)on Page 56(Workbook):,Useful structure(20ms),the Appo

18、sitive(words,phrases and clauses),同位语从句与that引导的定语从句的区别：,1、同位语从句与名词之间在逻辑上是“主语+be+表语”的关系。该名词是需要做特殊说明的抽象名词。例如：a)听说他们的队赢了，他们很高兴。_ _.b)消息就是他们队赢了。_.,They were delighted at the news that their team had won,The news was that their team had won,2、从引导词来看：引导词that在同位语从句中是连词，只起连接作用，无具体词义，that不可省略；that在定语从句中是关系代词

19、，它在从句中充当一定成分 主语或宾语，有具体词义，作宾语时还可以省略。例如：a)The factory _ we visited yesterday is a chemical one.b)The news _ he will leave for Shanghai is true.,(that),that,定语从句,同位语从句,3、同位语从句的简易判断方法：同位语与其先行词之间在逻辑上是“主语+be+表语”的同位语关系。所以，可以在名词从句之间加系动词be，使之构成一个新句子，如果合乎逻辑，句子通顺，则原句为同位语从句；定语从句是不能够有系表结构把先行词与从句连接起来的。例如：The beli

20、ef that the earth is flat is still held in some countries._.,The belief is that the earth is flat,另外，能用于名词性从句的名词有：ability,patience,anxiety,answer,order,report,wish,decision,suggestion,belief,doubt,fact,hope,message,news,promise,question,reply等等。,1.Along with the letter was his promise _ he would vis

21、it me this coming Christmas.(2004春季上海)A.which B.that C.what D.whether,答案B。这是一个同位语从句，解释promise的具体内容，要用that引导。,高考链接,2.There is a new problem involved in the popularity of private cars _ road condition need _.(2003年上海)A.that;to be improved B.which;to be improvedC.where;to be improved D.when;improving,解

22、析：答案为A.that引导同位语从句说明“新问题”的内容。Need后既可接动名词的主动式，也可接动词不定式的被动式作宾语。,3.Theres a feeling in me _ well never know what a UFO is not ever.(2002年上海)A.that B.which C.of which D.what,解析：答案A。同位语从句that well never know what a UFO is not ever作a feeling的同位语，解释a feeling 的具体内容。That连接同位语从句时，只起连接作用，不作从句的任何成分。,4.Informati

23、on has been put forward _ more middle school graduates will be admitted into universities.(2001年上海)A.while B.that C.when D.as,解析：答案B。That引导从句作information的同位语，解释information的具体内容。,5.These wild flowers are so special I would do _ I can to save them.(NMET2000春季北京)A.whatever B.that C.which D.whichever,解析

24、：答案A。do后接宾语从句，宾语从句I can 后省略了do，缺少宾语。Whatever在宾语从句中作宾语。,Finish the following exercises:1.His central idea is _ the losers do not write history.A.X B.because C.that D.whether2.I think _ certain that she will do well in her exam.A.that B.this is C.it D.whats,3.We should stick to _ is true.A.which B.tha

25、t C.anything which D.whatever 4.You will find no mistake _ Ive written.A.what B.in what C.with what D.that,新课标人教版课件系列,高中英语选修(模块）8,5.There is a rule in our school _ no one is permitted to smoke.A.where B.which C.that D.what 6.He didnt know which room _.A.they lived B.they lived in C.did they live D.d

26、id they live in,Assignment,1.Summarize the rules of the Passive Voice.2.Finish the exercises of“Discovering useful structures”on Page 22 and Page 64-65.,Take a break!,Period 4 Reading II,Unit 2 Cloning,Period 4:幻灯片49-61页,Warming up(4ms),Answer the following questions:1.Do you like dinosaurs?Where ha

27、ve 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 thats good for human beings?Why?(Students give their own answers.),Reading-I scanning(5ms),Read the text,then tell the following sentences are true or false.(Students can discu

28、ss in pairs.),Scientists are still experimenting with cloning mammals because they think it can make money.The animals that have disappeared from the earth,like dinosaurs,can be brought back to life through cloning.If we can clone any extinct animals,we should let them live in a zoo.,F,F,F,Reading-I

29、I Detail reading(6ms),Read the text,then answer the following questions.(Students can discuss in pairs.),Why shouldt you clone an extinct animal unless there is enough diversity in the group?Why is it wrong to clone an extinct animal if it would have to live in a zoo?Why cant you clone the DNA of an

30、imals that have been extinct longer than 10,000 years?,Why shouldt you clone an extinct animal unless there is enough diversity in the group?There will not be enough genetic variation in the group to be able to resist new illnesses.,2.Why is it wrong to clone an extinct animal if it would have to li

31、ve in a zoo?It is not a good idea to clone an animal that would have to live in a zoo because it is not a suitable habitat to develop and increase its numbers.The zoo is not a natural environment for a wild animal.,3.Why cant you clone the DNA of animals that have been extinct longer than 10,000 yea

32、rs?The DNA of animals more than 10,000 years old is not suitable for cloning,for it cant survive so long.,Reading-III Argument(10ms)1.Read the passage again and have a argument according to the requirement of Ex.2 on Page 16.2.Students work in groups,when discussing,the head of each group should wri

33、te down the opinions of all the members.3.Ask some volunteers to show their opinions.,Reading-IV Reading on Page 58-59(10ms)Students read the passage on Page 58-59,then finish the following chart:,For medical cloning,cure serious illnesses,who have,diseases,gradually lose their ability to move easil

34、y or to think,Against medical cloning,will cure an illness,the efficiency of the system,kill another human being,Reading-IV Feeding back(5ms)1.Students ask some questions about the two passages learnt in this class.2.Ask other students to answer the questions first,then the teacher makes a conclusio

35、n.,Assignment,1.Finish the exercises on workbook.2.Prepare for the next class.,Take a break!,Period 5 Listening and Speaking,Unit 2 Cloning,Listening I(5ms)Ex.1 on Page 17.,1.Listen to the passage for the first time,then tick those that you hear.,Keys:1 3 4,Listening II(10ms)Ex.2 on Page 17.,Listen

36、to the tape for the second time and finish the following chart:,cruel,unnatural things,“dead end”,a age of“mother”,weakens,wonderful,extinct,it is a new science,encouragement,provide medicine,Speaking(10ms)having a discussion:,1.With your partners,prepare a discussion according to the information in

37、 Ex.3 on Page 17-18(every member should take notes when they are preparing).2.Have the class discussion.,Listening III(15ms)Listening task on Page 57.,1.Listen to the tape for the first time and finish Ex.1 on Page 57.,Keys:1 F 2 O 3 F 4 F 5 F 6 F 7 F 8 O 9 O 10 F,Listening III(15ms)Listening task o

38、n Page 57.,1.Listen to the tape for the second time and finish Ex.2 on Page 57.,Keys:1.He wants to make his mother happy by keeping her pet dog alive forever and he also wants to take the chance to America for holiday when the dog is being there.2.Frank doesnt agree with cloning because he thinks cl

39、oning is very expensive and it has many moral problems.,3.Billys mother is in favour of cloning.She is saving money to go to America to have her pet dog cloning just before it dies.4.Various answers are possible.,1.It is moral to make my mother happy.2.It can provide an excuse for a holiday abroad.3

40、.My mother will need her pet when I am away.,3.Listen to the tape again,then finish the following chart:,1.It is very expensive to clone a pet.2.It is selfish because it is an excuse for a holiday.3.It is selfish because it means the student can study abroad without his mother complaining.,Assignmen

41、t,1.Finish the listening task on English Weekly.2.Make a conclusion of the listening and speaking skills learned in this class.,Take a break!,Period 6 Writing,Unit 2 Cloning,Period 6:幻灯片72-79页,Making clear the writing task(3ms),写作任务：Give your opinion on cloning写作要求：注意记叙文的表达方式 要写明白自己的观点，层次要分明。写作建议：本单

42、元主要讲述了“cloning”存在的 问题以及人们的态度，文中可适当就此进行发挥。,Writing I Discussion(5ms),Discuss in groups and write down the information you get.,After the discussion,the students write a passage according to the writing task.(There are at least 100 words.),Writing II(20ms),Writing III(12ms)Checking the articles.,1.Ask

43、 the students to check the articles for their partners.2.Show some articles on the screen,other students should give some advice.,One possible version:Together with the modernest advances in science and technology,the news that Dolly had been born was announced in 1997.However,Dollys death raised ma

44、ny opinions about cloning.Personally,I would like to agree that cloning may do no good to our human beings.,Firstly,seeing Dolly,we may think that cloning animals can easily develop a disease.They cant live long.Secondly,we cant clone animals that have been extinct longer than 10000 years,even if th

45、e DNA of dinosaurs could survive this long.Thirdly,based on what we know now,human cloning is just a matter of time but the assumption that human clones have already been born hasnt been proved yet.In one word,personally,the chances of cloning animals and cloning human beings living on the earth nat

46、urally are merely a dream.,Assignment,Try to correct the composition.Finish the exercises of unit 2 on English Weekly.,Take a break!,Language points for Reading IVideo data,Language Data Bank,幻灯片80-94页,1.This happens in plants when gardeners take cuttings from growing plants to make new ones,happen

47、vi.occur by chance;take place(偶然地）发生；出现 happen to do happen to sb.It happened that happening n.事件；偶然发生的事（常用复数）,当园艺工人割草而使之长出新的植物时，就会发生这种情况，、,Language points for Reading I,碰巧,（某人）发生什么事了,碰巧,辨析：happen,occur,take place与come about四词都有“发生”之意，但有区别。happen 是一般用语，词义较广，强调事情发生的偶 然性;occur 用法较正式，既可以指自然发生，也可以指有意安排。

48、take place 一般指有计划，按事先安排的进行的含义。come about 往往注重事情发生的原因，常与how 连用。注：以上四组词均为不及物动词，无被动语态。,Use the above words to fill the following blanks:1)When did the explosion _?2)Important elections _ this fall?3)The concert will _ next Sunday.4)How did the quarrel _?,occur,take place,come about,happen,2.The nucleus

49、 of this cell contains all the genes needed to produce a new sheep.,这个细胞得细胞核含有生产一只新的绵羊的必需的基因。,needed to produce a new sheep 为过去分词短语作后置定语，修饰其前面的名词genes,构成动宾搭配关系。,contain v.have or hold within itself 饱含，里面有,辨析：contain 与 include contain“包含，含有”，侧重于包含的内容或成分，“里面装有”；include“包括”，侧重范围或整体。Eg:1)Whisky _ a larg

50、e percentage of alcohol.2)The book _ forty maps,_ three of Great Britain.,contains,contains,including,3.The nucleus from sheep B and the egg cell from sheep A are joined using electricity.,Using electricity 为现在分词短语作方式状语。联手，携手 参加活动 和某人一起做事 参军，连起来,从绵羊B中取出得细胞核与从绵羊A中取出得卵细胞用电流使之结合。,Join hands,join in sth