高二英语人教版选修8Unit2Cloning习题点拨

1、第 1 页 共 17 页高二英语人教版选修8unit2cloning习题点拨教材习题点拨 prehending ? suggested answers to e_ercise 1：1 the first use is to produce mercial quantities of plants.the second is to research on new plants species and do medical research on animals.2 cloning plants is straightforward，but the cloning of animals is ve

2、ry plicated.3 the first clone from an adult animal was dolly the sheep.she died in 20_3.4 cloning is controversial in some countries for moral and religious reasons.? suggested answers to e_ercise 2：problems or dangers of cloning advantages of cloning animal clones may develop the illnesses of older

3、 animals.medical cloning could produce cures for serious illnesses in humans.animal clones may die younger than the donor animals.cloning plants can produce plants of similar quality for sale.evil 第 2 页 共 17 页leaders may want to clone themselves.cloning plants can be useful for research on new plant

4、 species.there are moral objections to cloning human beings.cloning can help save endangered animals.? suggested answers to e_ercise 3：i think the writer is impartial because he/she does not state any personal opinion about cloning.learning about language discovering useful words and e_pressions ? a

5、nswers to e_ercise 1：1 differ 2 cast 3 accumulate 4 e_act 5 altogether 6 objections 7 undertake 8 moral ? answers to e_ercise 2：1 pared with her family，and especially her nephew，her niece daisy is straightforward about her opinions.2 the arbitrary decisions of the factory leaders caused anger among

6、the workers.3 is the opera house in the mercial area of beijing? 4 the producer of the media programme made_an_objection_to jennifer joining in the chorus.5 before you can make a loaf，you need to obtain some flour.6 you owe the lady an 第 3 页 共 17 页apology.i will_forbid you to leave unless you apolog

7、ize for what you have done.? answers to e_ercise 3：1 attain 2 plicated 3 fate 4 carrier 5 cast 6 reform 7 accumulate discovering useful structures ? answers to e_ercise 1：1 the whole scientific world followed the progress of the first successful clone，dolly_the_sheep.2 then came the disturbing news

8、that_dolly_had_bee_seriously_ill.? answers to e_ercise 2：dolly the sheep became a scientific breakthrough when the news that_she_had_been_born was announced in 1997.however ，the problem that_she_later_developed_a_serious_lung_disease bothered scientists.on 14th february 20_3 scientists made the deci

9、sion that_dolly_should_be_put_to_sleep.dollys death ，like her birth，was bound to raise worries.the fact 第 4 页 共 17 页that_dolly_died_when_she_was_quite_young disappointed people the world over.scientists hold the belief that_cloning_may_lead_to_many_important_scientific_breakthroughs_and_ medical_tre

10、atments.but now the question es to their minds，“did_she_die_young_because_she_was_a_clone ？”besides that ，there is also a fierce debate over the question whether_human_cloning_e_periments_should_be_allowed.scientists believe human cloning is just a matter of time but the assumption that_human_clones

11、_have_already_ been_born hasn t been proved yet.1997年多莉羊诞生的消息宣布后便成为一项科学突破。但是，后来多莉染上严重肺病的问题又使科学家们忧虑。20_3 年 2 月 14 日科学家们作出让多莉羊长眠的决定。多莉之死正如它的出世一样，肯定会带来焦虑。多莉早亡的事实令世人失望。科学家们认为克隆可能会带来很多重大的科学突破和医学疗法，但是现在他们不得不思考这样的问题：“多莉早死是因为它是一只克隆羊吗？”除此以外，关于是否应该允许进行人类克隆实验的问题第 5 页 共 17 页也引起了激烈的争论。科学家们相信人类的克隆只不过是时间问题，但是克隆人已经

12、问世的说法还没有被验证实。? suggested answers to e_ercise 3：numerous answers are possible but all the clauses in the appositive should begin with the word“that ” 1 i have no idea that_she_would_e_ne_t_week_for_a_short_visit.2 we heard the news that_a_woman_trapped_under_the_ruins_for_si_days_was_rescued.3 john t

13、old the truth that_he_failed_in_the_test.4 betty won a prize that_she_had_dreamed_of_for_years.5 charles agreed to the regulation that_he_must_have_safety_training.6 yesterday i was glad to get a message that_the_interview_went_well.7 the fact that_the_people_in_the_earthquake- hit_areas_had_rebuilt

14、_their_homes_inspired_ all_of_us.8 i got the impression that_everyone_in_class_did_well_in_the_performance.using language reading ，discussing and writing ? suggested answers to e_ercise 1：第 6 页 共 17 页1 there will not be enough geic variation in the group to be able to resist new illnesses.2 it is no

15、t a good idea to clone an animal that would 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.? suggested answers to e_ercise 2：cloning is useful because it could find a cure for illnesses that are presently

16、incurable；it means that endangered species can be preserved ；it could help families who cannot have children of their own.it is a bad thing because it might produce monsters；it might bring back to life creatures that might harm us ；you might be cloned without your knowledge.listening and speaking li

17、stening te_t is cloning cruel? _iao qing(_q)and rachel brown(rb)are discussing whether cloning is cruel to animals or not.rb ：_iao qing ，do you think clonings cruel? _q：第 7 页 共 17 页what do you mean by that？the scientists are doing a wonderful job.soon they may be able to bring peoples favourite pets

18、 back to life! rb：yes，i know.but doesnt it seem cruel to you that it took 276 e_periments before dolly was successfully cloned？think of all those live cells and eggs that died in order for dolly to be born.i dont approve of that! _q ：but，rachel ，be reasonable.isnt it always like that with a new scie

19、nce？this is the way people learn to do things better.rb：i suppose sobut they also make the animals do such unnatural things.one poor cow was made to give birth to a bison.what was the poor creature to think when it saw its baby? _q：i don t quite understand why so many people are against cloning.i th

20、ink the scientists need a bit of encouragement.think of the benefits.cloning may be medical science to produce cures for serious illnesses.rb：yes，i know and i agree with that.its just that i dont agree with the methods._q：why not? rb ：well ，i think its a dead end.dolly the sheep was“middle - aged”wh

21、en she was born because her dna 第 8 页 共 17 页came from a middle- aged “mother” cloning your grandmother would mean a new baby started life as an old lady! _q：really ？i never thought of that! rb：and it weakens the species.cloning means that theres less variety in the species.so the animals may not be

22、able to resist a particular illness and they might die out._q ：oh dear ！and that was just what you and i were trying to avoid.in spite of all these，dont you think scientists would still be able to solve the problems? ? answers to e_ercise 1：1 3 4 5 ? suggested answers to e_ercise 2：rachel s ideas ab

23、out cloning _iao qings ideas about cloning 1 cruel to animals 1 scientists are doing a wonderful job 2 makes the animals do unnatural things 2 may bring peoples favourite pets back to life 3 it is a“dead end” 3 problems because it is a new science 4 weakens the species 4 it may provide cures for ser

24、ious illnesses 练习册答案及听力原文 unit 2 cloning listening listening te_t is human cloning a good idea? wang qiao(wq)is talking to clare peters(cp)about human cloning.wq：what do you think 第 9 页 共 17 页about human cloning，clare? cp ：i don t know what to think.but i suppose itll e one of these days.i think the

25、re are many problems that nobody has thought of yet.wq：what do you mean by that? cp：well ，a clone will be an e_act copy of the original donor.right? wq ：yes，so what? cp ：well ，whats the relationship between the clone and his original donor? wq：i suppose they must be like one person.the clone is the

26、same as his original donor.cp：let s suppose that you take a baby to a laboratory to be cloned.does it matter if the laboratory returns you the real baby and one clone or two clones? wq：yes，it does.but how could this possibly happen? cp：well ，the scientists may get confused.wq ：my goodness.surely the

27、y would notice if there is an age- gap between the donor and the clone.cp：maybe.what if the donor and the clone are very close in age? let us suppose they are both babies.wq：ok.cp ：let s suppose that the laboratory wanted to use the real baby to make more clones.perhaps they know parents who would l

28、ike to buy a cloned baby.perhaps this family is unable to have 第 10 页 共 17 页children of their own.so the laboratory keeps the real baby and sells the clones as they grow.wq：but thats a baby factory！that s not moral at all! cp：i know ，and thats why its important to get our ideas sorted out now.so we

29、really have to think about the problems of human cloning.wq：yes.now i see your point.we should do something about this.how about a class discussion？what do you think？.(fade out) ? answers to e_ercise 2：2 3 4 ? suggested answers to e_ercise 3 1 clare thinks people will want to buy cloned babies if th

30、ey cannot have babies of their own.2 people have not thought that there may be dishonest laboratories who will produce and sell cloned babies like a baby factory.3 various answers are possible but each needs a reason to be considered correct.4 various answers are possible but each needs a reason to

31、be considered correct.using words and e_pressions ? answers to e_ercise 1：第 11 页 共 17 页procedure ，assumption ，be bound to，resist，from time to time，restoring，shortly，claws ，brought back ? answers to e_ercise 2：1 in time 2 in danger 3 in vain 4 in black pen 5 in favour of 6 in the meantime ? suggested

32、 answers to e_ercise 3：1 i adore homemade rectangular loaves made with brown flour and nuts.2 he is very conservative，and is even in favour of a constitution that gives few rights to immigrant voters.3 when the leader of the chorus retired from the opera，they held a dinner party for him.4 the media

33、plays an important role in influencing public opinion.5 dont bother about taking down those decorations yet.the christmas celebrations arent over yet.6 the regulations for cloning animals are very strict.he was unable to continue his e_periments.7 dont bother yourself about cloning my pet cat.i wont

34、 e_pect to bring it back to life.8 the people in flooded areas owed a 第 12 页 共 17 页great deal to the pla soldiers for their rescue work.using structures ? answers to e_ercise 1：1 c 2 e 3 a/f 4 b 5 a/f 6 d the first sentence does not contain an appositive clause，but an objective clause.? answers to e

35、_ercise 2：1 that they should buy a new car 2 that they wanted the most e_pensive one 3 that they would save for si_ months 4 that sue s uncle had died une_pectedly 5 that she must follow when she inherited money 6 that she should save all her money in the bank 7 that she was doing the right thing to

36、 use the money appositive clauses：1 3 4 ? suggested answers to e_ercise 3：hans lotte ，the_e_plorer，is well- known for his e_cellent television documentaries.however，he does not look like a traditional television host，so many people cannot understand how_he_got_his_job.the fact that_mountain_climbing

37、_was_so_popular_in_his_hometown_in_florida encouraged his ambition.it made him interested in television documentaries that_he_both_could_take_risks_and_earn_a_living.so he 第 13 页 共 17 页made the decision that_he_would_study_earth_sciences_at_university.luckily the possibility that_he_spoke_many_langu

38、ages helped him bee a star when the tv pany visited russia.he soon became a regular presenter in front of the camera and viewers began to ask why_he_did_not_make_it_his_career.he became a great success.unhappily we have heard the news that_he_is_retiring_this_year，but everybody can still watch his f

39、ascinating series on tv.listening task listening te_t a discussion about cloning billy(b)and frank(f)are having a discussion about cloning pets.b：you know，frank ，i agree with cloning.my mum has a pet dog and she is devoted to her.i think if anything happened to this pet she would be very upset.so we

40、 want to keep my mother happy by keeping her pet alive forever! f：whats this all about？a little dog！surely you can make your mother happy again in another way！does she know what people did before cloning was a possibility? b：yes，and she knows the cloning procedure.she s read about the e_periments in

41、 第 14 页 共 17 页america.they offer chances for pets to produce their own stem cells.these stem cells will produce new pets at a very reasonable price.f：reasonable price！surely it will be very e_pensive.b：well ，my mother is saving money to go to america with the dog just before it dies.if she goes to t

42、he laboratory，well all spend a week in america.if were lucky，well be able to return after a few months with a new dog.f：now i understand.you just want a holiday trip to america，and getting a new dog is just an e_cuse.b：yes and why not? f ：you are encouraging your mother to love her dog，so she will w

43、ant to clone it when it gets old.then you will take advantage of that to have a good holiday.dont you think about the moral problems of cloning? b：no，i don t.its fine by me，if i can make my mother happy and enjoy myself as well.thats moral too! f：you know what they say about small dogs in western co

44、untries.people keep dogs instead of having a real baby.is that the case with your mother? b：certainly not！she has me after all.but i have to be away from her when i study abroad for my masters 第 15 页 共 17 页degree.she ll need her small dog then! f：i see.now i know why i dont agree with cloning.b：now

45、you know why i do.? answers to e_ercise 2：1 o 2 o 3 f 4 o 5 f 6 o 7 f 8 o 9 o 10 f ? suggested answers to e_ercise 3：1 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 cloned there.2 frank doesn t

46、 agree with cloning because he thinks cloning is very e_pensive 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 cloned just before it dies.4 various answers are possible.? suggested answers to e_ercise 4：billys arguments

47、 for cloning pets franks arguments against cloning pets 1 it is moral to make my mother happy.1 it is very e_pensive to clone a pet.2 it can provide an e_cuse for a holiday abroad.2 it is selfish because it is an e_cuse for a holiday.3 my mother will need her pet when i am away.3 it is 第 16 页 共 17 页selfish because it means the student can study abroad without his mother plaining.? answers to e_ercise 5：billy：yes，and she knows the_cloning_procedure.shes