Book 8 Unit 2 Extensive reading ---The return of the dinosaurs

1、Unit 2 Cloning, B8The return of the dinosaurs 12Lead-in 劍龍劍龍Stegosaurstes: Do you like dinosaurs? Where have you seen them? Can you see them in our real life? Why?Please enjoy some pictures about dinosaurs. 3霸王龍霸王龍/暴龍暴龍Tyrannosaurus tai,rns:rs4角龍角龍 Ceratopsian 5雷龍雷龍 brontosaurus ,brnts:rs 6翼龍翼龍ptero

2、dactyl ,pterudktil 7Listening Please listen to the tape, and answer the following question:Can we really clone dinosaurs now?We cannot clone dinosaurs, because its difficult for us to get its DNA. Its only a dream. Dinosaurs disappeared 65,000,000 years ago. So the chance of dinosaurs ever returning

3、 to the earth is merely a dream. 8Scanning Read the text, then tell the following sentences are true or false. ( Students can discuss 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 dinosau

4、rs, can be brought back to life through cloning.1. If we can clone any extinct animals, we should let them live in a zoo.FFF91. According to the passage, which of the following statements about cloning mammals is true? _. A. Cloning animals is still a new science B. Cloning animals needs a large num

5、ber of moneyC. Cloning animals is a dream of film makersD. Government disapproves of cloning animals.2. Dolly was cloned in _. A. 1979 B. 1983 C. 1996 D. 2005Choose the best answer.103. The reason why the returning of dinosaurs to the earth is impossible and unsuitable are the following EXCEPT _.A.

6、no perfect DNA for the growth of cellsB. no diversity of genes arranged in different waysC. that there is no suitable habitant for dinosaursD. that the present hi-technology is unable to clone extinct animals4. Why does cloning need perfect DNA? _. A. Because it can clone animals without diseases B.

7、 Because it can pass on its ability to resist diseases and continue the speciesC. Because it can clone much more advanced generationsD. Because it can make the cloning animals live longer and healthierD B 115. We can infer from the passage that _ . A. cloning extinct animals isnt merely a dream any

8、longerB. cloning extinct animals has a long historyC. it is proved that extinct animals 65,000,000 years ago cant come back to life at allD. people can not only visit extinct animals in the films but also in the zoo12Read the passage and answer the questions.1.Why shouldnt you clone an extinct anima

9、l unless there is enough diversity in the group?There will not be enough genetic variation(遺傳變異遺傳變異) 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?Because it is not a suitable habitat to develop and increase its numbers. The z

10、oo isnt a natural environment for a wild animal. 13SummarySummarize the passage in about 30 words. 14Discussion What is your opinion of cloning? Give your reason.Cloning is useful becauseu It is a bad thing becauseu 15In pairs discuss which extinct animals described below (which died out less than 1

11、0,000 years ago) are worth restoring by means of cloning. Choose one animal from the table below and use the information to help you argue why this animal should be restored to the earth.Auroch(1627) large wild cattle; long horns and hair; hair good for making clothes; horns can be used for decorati

12、on; need grasslands Dodo bird(1755) unable to fly; friendly and not harmful; large eggs and tasty meat that could be developed for food; needs hot climateGreat Auk(1844) very large bird that cant fly; lives by and in the sea; feathers dont absorb water; useful for protecting clothes from water Quagg

13、a (1883) skin looks like a zebra; can be used for decoration; meat very tasty; needs warm climate16A sample dialogue S1: I think the dodo bird should be returned to the earth. It hasnt been extinct very long. So its DNA will still be good enough for cloning.S2: 17Language points 1. The popularity of

14、 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. 在在侏羅紀公園侏羅紀公園這部電影中這部電影中, 有一位科學家克隆有一位科學家克隆了好幾種不同的絕種恐龍。類似這樣的電影很受了好幾種不同的絕種恐龍。類似這樣的電影很受歡迎歡迎, 證明了這一想法使人們感到既興奮又恐懼。證明了這一想法使人們感到既興奮又恐懼

15、。1) in which引導定語從句引導定語從句, how引導賓語從句。引導賓語從句。strike straik vt. /vi. (struck/strook, struck/ stricken) 打打,打擊打擊, 敲敲,敲擊敲擊,抓抓,打動打動,撞擊撞擊,沖擊沖擊,侵侵襲襲,襲擊襲擊,穿透穿透,罷工罷工; n.打擊打擊,毆打毆打,罷工罷工 strike into ones heart 使使刻骨銘心刻骨銘心 18Dont strike him on the head. 別打他的頭。別打他的頭。The ship struck a rock and started to sink. 船撞上礁石之

16、后開始船撞上礁石之后開始下沉。下沉。The clock stuck twelve (oclock). 時鐘敲響十二點。時鐘敲響十二點。They are striking for better working conditions. 他們?yōu)闋幦「盟麄優(yōu)闋幦「玫墓ぷ鳁l件而罷工。的工作條件而罷工。The plague struck the whole of Europe. 瘟疫襲擊了整個歐洲。瘟疫襲擊了整個歐洲。I struck the name of a friend of mine in the newspaper. 我在報紙我在報紙上突然發(fā)現(xiàn)了我朋友的名字。上突然發(fā)現(xiàn)了我朋友的名字。練習練

17、習完成句子。完成句子。I think by doing so _ (他是為了嚇唬你他是為了嚇唬你)._ (一次非常強烈的地震襲擊了一次非常強烈的地震襲擊了) Wenchuan in China in 2008._ (恐懼突然襲擊了我恐懼突然襲擊了我) in the dark.he is trying to strike terror into your heartA very big earthquake stuck Horror suddenly stuck me192. This is because the cloning of mammals is still a new scienc

18、e and its story only began seriously in the 1950s as this list shows: 這是因為克隆哺乳動物仍然還是一這是因為克隆哺乳動物仍然還是一門新的科學，它是從門新的科學，它是從20世紀世紀50年代才開始認真進行研年代才開始認真進行研究的，如下列所示：究的，如下列所示：(P 15)美句仿寫美句仿寫 我的英語學得好，這是因為我喜歡英語。我的英語學得好，這是因為我喜歡英語。I do well in English. This is because I like it. 對于我們的情況來說，如下列清單所示，我們的處對于我們的情況來說，如下列清

19、單所示，我們的處境非常嚴峻。境非常嚴峻。In our case, _, our condition is severely serious.as this list shows203. From time to time people suggest that extinct animals like dinosaurs, can possibly be brought back to life through cloning.人人們時常設想滅絕的動物們時常設想滅絕的動物,例如恐龍例如恐龍,有可能通過克隆技術使它們復有可能通過克隆技術使它們復活?；?。1) from time to time =

20、 occasionally, now and then有時有時,偶爾偶爾,間或間或The car manufacturers changed the car models from time to time.汽車制造商不時地改變車的型號。汽車制造商不時地改變車的型號。He only comes to the company from time to time. 他只是偶爾到公他只是偶爾到公司來。司來。My dad drips in on me from time to time. 我父親有時候會順道來我父親有時候會順道來看我。看我。He becomes quite unreasonable f

21、rom time to time. 他有時變得很他有時變得很沒有道理。沒有道理。 練習練習翻譯句子。翻譯句子。我在圖書館有時能看見?？怂刮以趫D書館有時能看見?？怂?Hicks) 。I can see Hicks in the library from time to time.他時而去看望他的父母。他時而去看望他的父母。He went to visit his parents from time to time.212) bring back to life 使復活使復活/蘇醒蘇醒/生動生動,恢復生機恢復生機And anyway he was dead. Nobody could bring

22、him back to life. 總之，他已經(jīng)死了。沒有人能使他復活。總之，他已經(jīng)死了。沒有人能使他復活。He had hoped to one day bring his parents back to life thanks to medical progress. 他曾希望有一天醫(yī)療發(fā)展到他曾希望有一天醫(yī)療發(fā)展到能讓父母復活。能讓父母復活。拓展拓展 come to life 蘇醒；振作起來；表現(xiàn)生動蘇醒；振作起來；表現(xiàn)生動come into being 形成；產(chǎn)生；出現(xiàn)形成；產(chǎn)生；出現(xiàn)bring back 拿回來拿回來, 帶回來帶回來, 使回憶起來使回憶起來, 使恢復使恢復All li

23、brary books must be brought back before June 12th. 圖書館的所有書必須在六月十二日前歸還。圖書館的所有書必須在六月十二日前歸還。His story brought back our happy childhood together. 他他的故事使我們想起了共同度過的快樂童年。的故事使我們想起了共同度過的快樂童年。The defeated classes wanted to bring back their lost paradise. 失敗的階級想要恢復他們失去的天堂。失敗的階級想要恢復他們失去的天堂。224. All efforts of c

24、loning an animal will be in vain if there is not enough diversity in the group to overcome illnesses. 如果某個動物如果某個動物群體沒有足夠的多樣性以戰(zhàn)勝疾病，那么克隆這種動物的所有努群體沒有足夠的多樣性以戰(zhàn)勝疾病，那么克隆這種動物的所有努力都將是無用的。力都將是無用的。in vain白費力白費力,枉費心機枉費心機,徒然徒然,徒勞無功徒勞無功,無效地無效地, 輕慢輕慢,不尊敬不尊敬We tried in vain to make him change his mind. = We tried t

25、o make him change his mind, but in vain. 我們想使他改變主意，結我們想使他改變主意，結果是白費心機。果是白費心機。All attempts to rescue the boy with cancer were in vain. 為救那個為救那個患癌癥的男孩的所有嘗試都無濟于事?；及┌Y的男孩的所有嘗試都無濟于事。練習練習翻譯句子。翻譯句子。那個女孩怎么也打不開那扇鎖著的門。那個女孩怎么也打不開那扇鎖著的門。The girl tried _.我試圖說服他，但無效。我試圖說服他，但無效。I tried to persuade him, but in vain.我們的工作全都白干了。我們的工作全都白干了。All our work was in vain.in vain to open the locked door235. but others will survive and pass on the ability to resist that disease to the next generation. 而另外一些卻能存活而另外一些卻能存活下來，并且把這種抗疫力傳給下一代。下來，并且把這種抗疫力傳給下一代。 resist rizist vt.抵抗抵抗, 抵制抵制,抗拒抗拒,反抗反抗,防止防止,耐耐,抗抗,忍住忍住 (與與