人教版高中英语选修八课件：Unit 2 Using language(共40张PPT).ppt

1、Using languageThe return of Dinosaurs?霸王龙 tyrannosaurus剑龙 stegosaurs雷龙 brontosaurus翼龙pterodactylLook at the following pictures and think which film they are from.1.Have you ever seen the film Jurassic 2.Park?Why do people like this film?What animals do you see in the film?Are they real?2.Do you like

2、 dinosaurs?Can you see them in our real life?Why?3.Do you think it is possible to clone dinosaurs?If not,why?If yes,do you think thats good for human beings?Why?Arrange according to time.5.research using the embryos of mice4.first experimental clones of cows8.first experimental clones of mice7.work

3、on the embryos of sheep and mice2.Chinas first cloned twin calves3.cloing of frogs 6.first clone of a mammal1.cow gave birth to a bison3 5 7 8 4 6 1 21.Scientists are still experimenting with cloning mammals because they think it can make money.2.The animals that have disappeared from the earth,like

4、 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.FFFTrue or False1.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 b

5、y cloning C.thinks it impossible or unsuitable to clone extinct animals like dinosaurs D.dreams of dinosaurs returning to the earthChoose the best answer.C 2.The film Jurassic Park is popular because _.A.people are interested in the subject of cloning B.all the actors are dinosaurs C.it was directed

6、 by a scientist who clones dinosaurs D.it proves very interestingA3.Which of the following is true?A.Mice were cloned in 1981.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.D4.The reasons why a group of cloned animals al

7、l die of the same illness do NOT include _.A.they have the same arrangement of genes B.there isnt 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 diseaseC5.We can infer from the text that _.A.scientists are ex

8、perimenting to clone dinosaurs B.dinosaurs will never return to the earth C.cloned animals will only live in the zoo D.the DNA of dinosaurs can only survive 10 000 yearsBRead the text and answer the questions.1.Why shouldt you clone an extinct animal 2.unless there is enough diversity in the 3.group

9、?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 live in a zoo?It is not 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 number

10、s.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 more than 10,000 years old is not suitable for cloning,for it cant survive so long.Give some reasons why it is either impossible or unsu

11、itable to clone extinct animals.Reason 1:Reason 2:Reason 3:You need perfect DNT.There is not enough diversity for cloned animals to overcome new diseases.It would be unfair to clone any extinct animals if they would have to live in a zoo.Advantage of diversityDisadvantage of diversityDiversity in a

12、group of cloned animalsIf there is a new illness,some of these animals may die,but others will survive and passed on the ability to resist that disease to their children.They would all have the same arrangement of genes and so they might all die of the same disease.People interested inNot only film

13、makers but also _._ for its impossibility Perfect DNA is needed.There is not enough _ in the group.A(n)_ would be needed for the cloned extinct animals.ordinary peopleReasonsdiversitysuitable habitat_The chance of dinosaurs returning to the earth is _.Conclusionmerely a dreamCareful ReadingChoose sy

14、nonyms1.It proves how the idea struck a mixture of fear and exitment into peoples hearts.A.Have on the brain B.Confused C.Droved people crazy D.Scared2.From time to time people suggest that extinct animalsA.There was a time when B.Occasionally C.All the time D.Each timeAB3.People suggest that dinosa

15、urs,can possibly be brought back to life.A.Kept up B.resist C.live on D.relived4.The initial requirement is that you need perfect DNA.A.Most thankful B.most pressing C.most difficult D.most neededDD5.All efforts of cloing an animal will be in vain if there is not enough diversity.A.Go to wast B.usel

16、ess C.helpless D.meaningless6.Others will pass on the ability to resist that disease.A.oppose B.slide C.hire D.indicateBA7.The chance of dinosaurs ever returning to the earth is merely a dream.A.only B.surely C.abruptly D.miserably A1.The popularity of the film Jurassic Park,in which a scientist clo

17、nes several different kinds of extinct dinosaurs,proves how the idea struck a mixture of fear and excitement into peoples heart.电影侏罗纪公园的受欢迎证实了普通人对这一话题是多么感兴趣,在该电影中一位科学家克隆了几种不同的绝种恐龙。本句是一个复合句,in which引导非限制性定语从句,修饰“the film”;how引导宾语从句,作prove的宾语。Language Points解析:题意为“很多看过这部电影的人,当回想到人被老虎吃掉的情景时,就不敢去森林了”。本题

18、考查“介词+关系代词”引导的定语从句。“people were eaten by the tiger”是定语从句,先行词the scenes在定语从句中作地点状语,表示“在这种场景中”。Many people who had seen the film were afraid to go to the forest when they remembered the scenes _ which people were eaten by the tiger.inpopular adj.popularity n.strike v.打;撞击;罢工strike into ones heart 使刻骨铭

19、心He struck a knife into the traitors heart.他将刀戳入卖国贼的心脏。2.Do/make/carry out/perform an experiment on/in/with 做.实验,对.做实验3.from time to time 有时；偶尔；时常4.bring back to life 使复生区别:bring back to life 与come to lifebring back to life 是从某个事情中,给唤回到现实生活中,比如,从睡梦中醒来,有点恍然大悟的意思,或者是从生死关头逃离出来幸好得以保命之类;而come to life指出生,

20、有生以来。5.but others will survive and pass on theability to resist that disease to the nextgeneration.1)pass onto 传递;留给2)Would you pass it on to the next person?3)把它传给下一个人好吗?2)resist vt.抵抗,反抗;抗拒The nation was unable to resist the invasion.该国无力抵抗侵略。6.Based on what we know now,you cannot clone animals th

21、at have been extinct longer than 10,000 years.就我们现在所知,你不可能克隆那些已经绝种了一万年以上的动物。Based on what we know now是过去分词短语作状语,其逻辑主语一般和句子的主语相一致。_（drive）by a greater demand for egetables,farmers have built more green houses.Driven解析:题意为“由于受到更大的蔬菜量需求的推动,农民修建了更多的温室”。根据后边的完成时态,驱动力已经有了,不是正在推动。Fill in the blanks with th

22、e words given.1.She was _ by her husbands death.2.My uncle comes to have dinner with us _.3.He has been working so hard at his lessons,so he _ pass the exam this time.4.Finally his efforts _.5.All of them were strongly _ the project.cast downfrom time to timecast down pay off in favour of from time

23、to time be bound to is bound topaid offin favour ofIs cloning cruel?Listen and see whether you agree with Xiao Qing or Rachel.1 Read these statements before listening.Tick those that you hear.1.Cloning will bring dead pets to life.2.There were 627 experiments before Dolly was successfully cloned.3.C

24、loning may help cure serious illnesses.4.Its a dead end.5.Dolly the sheep was“middle-aged”when she was born.6.So your grandmother would be able to start her life all over again and live much longer.2 Listen to the tape again and then fill in the chart.Marys ideas about cloningcruel to animalsmakesthem do unnatural thingsit is a“dead end”weakens the speciesXiao Qings ideas about cloningscientists are doing a wonderful jobmay bring peoples favourite pets back to lifeproblems because it is a new scienceit may provide cures for serious for illnesses