1、1.Review some knowledge about cloning.2.Practice expressing and surpporting an opinion.3.Reinforce the important language points of Unit2.Find the main idea for each paragraph Para1 The possibility of cloning and extinct wild animals has always excited film makers.And they are not the only ones!The
2、popularity of films such as Jurassic Park,in which a scientist clones several kinds of extinct dinosaurs,proves how the idea struck a mixture of fear and excitement into peoples hearts.But in fact we are a long way from being able to clone extinct animals.Scientists are still experimenting with clon
3、ing mammals.This is because the cloning of mammals is still a new science and its story only began seriously in the 1950s as Find the main idea for each paragraph()Explain the impossibility of cloning dinosaurs.()Conclude that its just a dream.()Introduce the topic of the passage.Para2 From time to
4、time people suggest that extinct animals like dinosaurs,can possibly be brought back to life through cloning.Unfortunately,with what we know now,this is either impossible or unsuitable.There are many reasons.The initial requirement is that you need perfect DNA(which gives information for how cells a
5、re to grow).All efforts of cloning an animal will be in vain if there is not enough diversity in the group to overcome illnesses.Diversity in a group means having animals with their genes arranged in different ways.The advantage is that if there is a new illness some of these animals may die,but oth
6、ers will survive and pass on the ability to resist that disease to the next generation.The great drawback to cloning a group of animals is that they would all have the same arrangement of genes and so might die of the same illness.Then none of them would be left to continue the species.It would be u
7、nfair to clone any extinct animals if they were to live in a zoo.A suitable habitat would be needed for them to lead a natural life.Find the main idea for each paragraph(Para2)Explain the impossibility of cloning dinosaurs.()Conclude that its just a dream.(Para1)Introduce the topic of the passage.Pa
8、ra 3 Based on what we know now,you cannot clone animals that have been extinct longer than 10,000 years.Actually,dinosaurs disappeared 65,000,000 years ago.So the chance of dinosaurs ever returning to the earth is merely a dream.Find the main idea for each paragraph(Para2)Explain the impossibility o
9、f cloning dinosaurs.()Conclude that its just a dream.(Para1)Introduce the topic of the passage.1.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 by a scientist who clones dinosaurs D.it proves very interes
10、tingPara1:The popularity of films such as Jurassic Park,in which a scientist clones several kinds of extinct dinosaurs,proves how the idea struck a mixtrue of fear and excitement into peoples hearts.2.The reasons why a group of cloned animals all die of the same illness do NOT include _.A.they have
11、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 diseasePara2:All efforts of cloning an animal will be in vain if there is not enough diversity in the group to overcom
12、e illnesses.some of the animals may die,but others will survive and pass on the ability to resist the disease.they would all have the same arrangement of genes and so might die of the same illness.Then none of them would be left to continue the species.3.The writer of the text _.A.is excited by the
13、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 earthPara3:So the chance of dinosaurs ever returning to the ear
14、th is merely a dream.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 10000 year4.Fill in the blanks.ordinary peopleReasonsdiversitysuitable h
15、abitatmerely a dreamConclusion Part1 State your opinion.Part2 List your reasons.Part3 Draw a conclusion.Part1 State your opinion.The dodo is the most suitable animals to bring back to life.Part2 List your reasons The aurochs is too large and grasslands are few.The great auk does not economically rep
16、ay all the efforts needed to restore it.The quagga does not have enough appeal.It is too similar to the zebra to be worth the trouble of restoring it.The dodo became extinct fairly recently so its DNA is still in good condition The benefits of restoring the dodo.Part3 Draw a conclusion.So I think th
17、e dodo would be the best choice to bring back to life both for pleasure and for food.1.The popularity of films such as Jurassic Park,in which a scientist clones several kinds of extinct dinosaurs,proves how the idea struck a mixture of fear and excitement into peoples hearts.2.From time to time peop
18、le suggest that extinct animals like dinosaurs,can possibly be brought back to life through cloning.from time to time有时有时,间或间或,偶尔偶尔,=occasionally,now and then。3.Diversity in a group means having animals with their genes arranged in different ways.with+宾语宾语+宾语补足语宾语补足语 base sth.on/upon sth.is based on
19、/upon4.Based on what we know now,you cannot clone animals that have been extinct longer than 10000 years.what引导宾语从句引导宾语从句 that 引导定语从句引导定语从句4.Based on what we know now,you cannot clone animals that have been extinct longer than 10000 years.I.选用方框内合适的短语并用其正确形选用方框内合适的短语并用其正确形式填空（每个短语限用一次）。式填空（每个短语限用一次）
20、。strike.into ones heart,in vain,from time to time,based on,be bound tobring.back to life,in favour of,die out1.My dad cooks dinner _,but usually my mom does it.2.They tried to persuade her to go,but their efforts were _.from time to time in vain 3.My father died last year.I wish I could _ him _.brin
21、g back to life strike.into ones heart,in vain,from time to time,based on,be bound tobring.back to life,in favour of,die out4.This species has nearly _ because its habitat is being destroyed.5.The scene _ terror _.He is still unwilling to talk about it now.6._ the results,a conclusion was made by us.
22、died out struck into his heartstrike.into ones heart,in vain,from time to time,based on,be bound tobring.back to life,in favour of,die outBased on 7.I was surprised he is so strongly _ smoking because he is usually very reasonable about health issues.8.We _ beat the disease through a global paterner
23、ship.in favour of strike.into ones heart,in vain,from time to time,based on,be bound tobring.back to life,in favour of,die outare bound to II.语法填空语法填空1.I have a strong _(object)to _(get)up early everyday.2.Would you object _ my opening the window?3.It is _(disturb)for a five-year-old boy to explain
24、a scientific theory.4.Visitors are _(forbid)to touch the exhibits.objectiongetting to disturbing forbidden 5.His efforts paid _ when the manager accepted his proposal.6.Im sorry to differ _ you _ the matter.7.She blushed,_(cast)her eyes down.8.What he did wasnt actually illegal,but it was _(moral)wrong.off from on/over casting morally The rest three extinct animals Aurochs,Great auk and Quagga are left for you.Follow the example,and write your own report.
