选修八21《Unit2　Cloning》

1、新课标人教版课件系列高中英语选修选修( (模块）模块）8- 8-2.1 English Song English Class Language Data Bank课时分配课时板块结合范例Period 1&2 Warming up and Reading I Period 3Learning about languagePeriod 4Reading IIPeriod 5Listening and Speaking Period 6WritingUnit 2 Cloning Period 1&2: 幻灯片9-26页Look at the following pictures and answer

2、 the questions:1. Its the most famous sheep in the world. Do you know how Dolly is different from other sheep?Warming 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 pla

3、nt.3. Are the following clones the same? If not, what is the difference?NO. The first four are man-made clones, the rest two 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 pl

4、ants is simple and relatively easy. It can be done by taking cuttings (man-made cloning ) or letting the plant produce its own runners (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 Scann

5、ing ( 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.2.Gardeners can make a lot of money by cloning plants.3.Cloning animals is as complicated as cloning plants. FFT4. Dolly the sheep was the first successful clone of

6、a mammal5.Natural clones happen in animals as will as in plants.TT1.Dolly the sheep_. A. looked exactly like the sheep that provides 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. R

7、eading II Skimming ( 5ms )Choose the right answer according to the text.2. It can be inferred from the passage that a cloned animal_. A. usually 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 t

8、he original one3. Which of the following is not an advantage of cloning?A. Cloning can be used for medical purposes. B. Large quantities of food can be produced by cloning.C. Cloning can help keep animals from becoming extinct.D. Famous persons who have passed away can be cloned.4. What is peoples f

9、ear about human cloning? Which of the following is wrong?A. Cloned Hitlers would do harm to the world.B. Cloned people may be killed at will for medical aid.C. A woman would have difficulty recognizing her real husband.D. Men will die out because a woman can give birth to a baby without a husband.Re

10、ading III Detail reading ( 8ms )Fill in the chart using the information from the text.Problems or dangers of cloningAdvantages of cloningAnimals may_ _ of older animals.Medical cloning could _ _ for serious degenerative(变质的）变质的）_ in humans. developtheillnessesproducecuresillnessesAnimal clones may _

11、 _ than the donor animalsCloning plants can _ _ of similar _ _ _ ._ _ may want to clone themselves.Cloning plants can be _ for research on _ _ _ .There are _ _ to cloning human beings.Cloning can help save _ _ .dieyoungerproduceplantsqualityforsaleleaderusefulEvil plantspeciesmoralobjectionsendanger

12、edanimalsnewReading 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 making an exact copy of another animal and blemstwo majore

13、ffectforbiddenPractice 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:Questions:1. Do you support the idea of producing human embryos(胚胎胚

14、胎)for medical purposes?Why?2. Do you think it a good idea to use cloned humans for organ(器官器官)transplants? Why?3. Do you think a cloned human should have human rights? Why?4. Do you think cloned humans will have the same talents as the original ones? Why? Assignment Surf the Internet to find more in

15、formation about cloning and you are expected to present it to your classmates in the next class.Unit 2 Cloning Period 3: 幻灯片27-48页Checking answer I (2ms)Answer keys for Ex.1 on Page 13:1. differ2. cast down3. accumulated4. undertake5. exact6. altogetherChecking answer II (2ms)Answer keys for Ex.2 on

16、 Page 13:1. straightforward2. arbitrary3. commercial4. Are you in favour of5. procedure6. I object7. will forbidChecking answer III ( 3ms )Answer keys for Ex.3 on Page 13:1. undertake2. controversial3. satisfaction4. Cast down5. breakthrough6. accumulateChecking answer IV (2ms)Answer keys for Ex.4 o

17、n Page 14:1. C2. F3. D4. E5. B6. AChecking answer V (10ms)Answer keys for Ex.2 (Translation) on Page 56(Workbook):1. My rabbit gave birth to four exactly identical babies several days ago.2. From time to time we think that humans can use cloning to bring extinct animals back to life.3. The plan to d

18、evelop human clones is bound to raise controversial questions.4. 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 couldnt obtain the graduation

19、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 )同位语从句与同位语从句与that引导的定语从句的区别：引导

20、的定语从句的区别：1、同位语从句与名词之间在逻辑上是、同位语从句与名词之间在逻辑上是“主语主语+be+表语表语”的关系。该名词是需要做特殊说明的的关系。该名词是需要做特殊说明的抽象名词。例如：抽象名词。例如：a) 听说他们的队赢了，他们很高兴。听说他们的队赢了，他们很高兴。 _ _ .b) 消息就是他们队赢了。消息就是他们队赢了。 _.They were delighted at the news that their team had wonThe news was that their team had won2、从引导词来看：引导词、从引导词来看：引导词that在同位语从句在同位语从句中

21、是连词，只起连接作用，无具体词义，中是连词，只起连接作用，无具体词义，that不可省略；不可省略；that在定语从句中是关系代在定语从句中是关系代词，它在从句中充当一定成分词，它在从句中充当一定成分 主语或主语或宾语，有具体词义，作宾语时还可以省略。宾语，有具体词义，作宾语时还可以省略。例如：例如： a) The factory _ we visited yesterday is a chemical one. b) The news _ he will leave for Shanghai is true.(that)that定语从句定语从句同位语从句同位语从句3、同位语从句的简易判断方法：

22、同位语、同位语从句的简易判断方法：同位语与其先行与其先行词之间在逻辑上是词之间在逻辑上是“主语主语+be+表语表语”的同位语关的同位语关系。所以，可以在名词从句之间加系动词系。所以，可以在名词从句之间加系动词be，使，使之构成一个新句子，如果合乎逻辑，句子通顺，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：结构把先行词与从句连接起来的。例如：The belief that the earth is flat is still held in some countries._ .T

23、he belief is that the earth is flat另外，能用于名词性从句的名词有：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。等等。1. Along with the letter was his promise _ he would visit me this coming Christmas

24、.( 2004春春季上海季上海 ) A. which B. that C. what D. whether答案答案B B。这是一个同位语从句，解释。这是一个同位语从句，解释promisepromise的具体内容，要用的具体内容，要用thatthat引导。引导。高考链接2. There is a new problem involved in the popularity of private cars _ road condition need _ .( 2003年上海年上海 )A. that; to be improved B. which; to be improvedC. where;

25、to be improved D. when; improving解析：答案为解析：答案为A. that引导同位语从句说明引导同位语从句说明“新问题新问题”的内容。的内容。Need后既可接动名后既可接动名词的主动式，也可接动词不定式的被动式词的主动式，也可接动词不定式的被动式作宾语。作宾语。3. Theres a feeling in me _ well never know what a UFO is not ever. ( 2002年上海年上海) A. that B. which C. of which D. what解析：答案解析：答案A。同位语从句。同位语从句that well nev

26、er know what a UFO is not ever作作a feeling的同位语，解的同位语，解释释a feeling 的具体内容。的具体内容。That连接同位语从句时，连接同位语从句时，只起连接作用，不作从句的任何成分。只起连接作用，不作从句的任何成分。4. Information has been put forward _ more middle school graduates will be admitted into universities.( 2001年上海年上海) A. while B. that C. when D. as解析：答案解析：答案B。That引导从句作

27、引导从句作information的同的同位语，解释位语，解释information的具体内容。的具体内容。5. These wild flowers are so special I would do _ I can to save them.( NMET2000春季春季北京北京) A. whatever B. that C. which D. whichever 解析：答案解析：答案A。do后接宾语从句，宾语从句后接宾语从句，宾语从句I can 后省略了后省略了do，缺少宾语。，缺少宾语。Whatever在宾语在宾语从句中作宾语。从句中作宾语。Finish the following exe

28、rcises: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. that C. anything which D. whatever 4. You will find no mistake _ I

29、ve 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选修( (模块）模块）8 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. did they live inAssignment1. Summar

30、ize the rules of the Passive Voice.2. Finish the exercises of “Discovering useful structures” on Page 22 and Page 64-65.Unit 2 Cloning Period 4: 幻灯片49-61页Warming up ( 4ms )Answer the following questions:1. Do you like dinosaurs? Where have you seen them? Can you see them in our real life? Why?2. Do

31、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 discuss in pairs. )1. Scientists are still experimenting

32、 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.FFFReading - II Detail reading ( 6ms )Read the text, th

33、en answer the following questions. ( Students can discuss in pairs. )1. Why shouldt you clone an extinct animal unless there is 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 cant you clone the DNA of animals that have been extinc

34、t longer than 10,000 years?1. 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 live in a zoo? It is not a

35、 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 years? The DNA of animals

36、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 write down the o

37、pinions 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:Team Whats their argument?Two reasons for/against medical cloningDo you agree with them?why?A1.to _that have no

38、 cure at the momentVarious answers and reasons are possible2. To help people _which make them_ For medical cloningcure serious illnesseswho havediseasesgradually lose their ability to move easily or to thinkTeam Whats their argument?Two reasons for/against medical cloningDo you agree with them?why?B

39、1.to make the stem cells that _of one person, you have to_ Various answers and reasons are possible2. Scientists are worried about _Against medical cloningwill cure an illnessthe efficiency of the systemkill another human beingReading - IV Feeding back ( 5ms )1. Students ask some questions about the

40、 two passages learnt in this class.2. Ask other students to answer the questions first, then the teacher makes a conclusion. Assignment 1. Finish the exercises on workbook. 2. Prepare for the next class.Unit 2 Cloning Listening I ( 5ms )Ex. 1 on Page 17. 1. Listen to the passage for the first time,

41、then tick those that you hear.Keys: 1 3 4 Listening II ( 10ms ) Ex.2 on Page 17.Listen to the tape for the second time and finish the following chart:cruelMarys ideas about cloningXiao Qings ideas about cloing_ to animalsscientists are doing a _ jobmakes them do _May bring back _animalsit is a _ pro

42、blems because _clone born _scientist need _ the speciesit may _ for illnessunnatural things“dead end”a age of “mother”weakenswonderfulextinctit is a new scienceencouragementprovide medicineSpeaking ( 10ms ) having a discussion:1. With your partners, prepare a discussion according to the information

43、in 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 FListening III ( 15ms ) List

44、ening task on 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

45、 he thinks cloning 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 ho

46、liday abroad.3. My mother will need her pet when I am away. 3. Listen to the tape again, then finish the following chart:Arguments for cloning petsArguments against cloning pets1.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 mean

47、s the student can study abroad without his mother complaining.Assignment 1. Finish the listening task on English Weekly. 2. Make a conclusion of the listening and speaking skills learned in this class.Unit 2 Cloning Period 6: 幻灯片72-79页Making clear the writing task ( 3ms )写作任务：写作任务：Give your opinion

48、on cloning写作要求：注意记叙文的表达方式写作要求：注意记叙文的表达方式 要写明白自己的观点，层次要分明。要写明白自己的观点，层次要分明。写作建议：本单元主要讲述了写作建议：本单元主要讲述了“cloning”存在存在的的 问题以及人们的态度，文中问题以及人们的态度，文中可适当就此进行发挥。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 acco

49、rding to the writing task.( There are at least 100 words. )Writing II ( 20ms )Writing III ( 12ms )Checking the articles.1. Ask 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 mod

50、ernest advances in science and technology, the news that Dolly had been born was announced in 1997. However, Dollys death raised many 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 ca

51、n easily develop a disease. They cant live long. Secondly, we cant clone animals that have been extinct longer than 10000 years, even if the 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

52、already been born hasnt been proved yet. In one word, personally, the chances of cloning animals and cloning human beings living on the earth naturally are merely a dream.Assignment1. Try to correct the composition .2. Finish the exercises of unit 2 on English Weekly.Language points for Reading IVid

53、eo data幻灯片80-94页 1. This happens in plants when gardeners take cuttings from growing plants to make new ones, happen vi. occur by chance; take place (偶然地）发生；出现偶然地）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）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，就会发生当园艺工人割草而使之长出新的植物时，就会发生

54、这种情况，、这种情况，、碰巧碰巧（某人）发生什么事了（某人）发生什么事了碰巧碰巧辨析：辨析：happen, occur, take place与与come about四词都有四词都有“发生发生”之意，但有区别。之意，但有区别。 happen 是一般用语，词义较广，强调事情发生的偶是一般用语，词义较广，强调事情发生的偶 然性然性; occur 用法较正式，既可以指自然发生，也可以指有用法较正式，既可以指自然发生，也可以指有意安排。意安排。take place 一般指有计划，按事先安排的进行的含义。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，常与往往注重事情

55、发生的原因，常与how 连用。连用。注：以上四组词均为不及物动词，无被动语态。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 _ ?occurtake placecome abouthappen2. The nucleus of this cell contains

56、 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这个细胞得细胞核含有生产一只新的绵羊的必需的基因。基因。needed to produce a new sheep 为过去分词短为过去分词短语作后置定语，修饰其前面的名词语作后置定语，修饰其前面的名词genes, 构构成动宾搭配关系。成动宾搭配关系。contain v. have or hold within itself 饱含，饱含， 里里面有面有辨析：辨析：contain 与与 include contain “包含，含有包含，含有”，侧重于包含的内容，侧重于包含的内容或成分，或成分，“里面装有里面装有”； include “包括包括”，侧重范围或整体。，侧重范围或整体。Eg:1) Whisky _ a large percentage of alcohol. 2) The book _ forty maps, _ three of Great Britain.containscontainsincluding3. The nucleus from sheep B and the egg cell from sheep A are joined using