4. Reading Where is it leading us? Book 8 unit 2

5. Natural clone is one that occurs in a natural form of cloning without human help. Man-made clone is one that is produced through human intervention( 介入 ). Warming up Two kinds of clones:

6. In pairs, look at these pictures and discuss which ones are natural clones and which ones are man- made. Explain how they differ. Discussion

7. A strawberry plant The new plants that grow from the runners are exact copies of the original plant.

8. Growing new plants

9. 富贵竹插枝即活 The gardener cuts the plant,and then the cutting produces another new plant.

10. Twins They are born naturally and identical in sex and appearance.

11. She was cloned while the others were born naturally. Dolly was a ______ sheep. cloned How does Dolly differ from other sheep? In 1996, a sheep called Dolly was born. It is the first mammal to be cloned. It is considered to be the greatest success in the development of cloning.

12. The following are some photos about cloning. See how much you know about it.

13. 2001 cloning cattle 2003 Cloning horse 2002cloning rabbits 2002 cloning cats

14. 2005 cloning dogs 克隆的荧光小猪 ( 左 ) 和正 常小猪 ( 右 )

15. Skimming Please read the passage quickly and get the main idea, and then finish the following exercises in groups.

16. 1. The main idea of the text is____ A. animal cloning is very valuable and can benefit the world. B. animal cloning could be misused by bad people so it must be forbidden C. animal cloning is well developed because Dolly the sheep was born. D. animal cloning raised arguments and scientists are not sure about its future. 主旨大意

17. 2. The cloning of Dolly the sheep succeeded because____. A. its easier to clone a sheep than other animals B. the scientists were determined and worked hard with patience C. the scientists were rewarded and got lots of money D. many other attempts to clone mammals failed B 细枝末节

18. 3. What is people's fear 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.

19. 4. The sheep that donated the somatic cell most probably lived ____ years. A. 3 B. 6 C. 9 D. 13 推理判断

20. 5. We can infer from the last three paragraphs that ___. A. The normal development of Dolly had no effect on the cloning of other species. B. Dolly’s serious disease and final death disturbed the whole world. C. There were arguments about animal cloning and concerns about the future of cloning. D. Dolly successfully cloned a new lamb with the help of cloning scientists.

21. Reading Listen to the tape and find out the main idea of each paragraph. listening

22. The main idea of each paragraph. a way of making an exact copy of another animal and plant. problems two major effect 1.Cloning is ______________________________ 2.Cloning has ____________ uses. 3.The _________ of Dolly. 4. The ________ of Dolly. 5. People’s to cloning.reaction

23. Cloning is a way of making an exact copy of another animal and plant. What is cloning ? It happens both in ______ and in_______. They can be cloned by ________ and _______. plants animals themselveshumans Natural clone Man-made clone Para 1 The definition of cloning

24. Firstly, …commercial… Secondly, …research… Para 2 The major uses and procedures of cloning In this paragraph, the word “straightforward” means ____. A. uncomplicated B. honest C. frank D. difficult

25. At first, the fact that Dolly developed ______ in a natural way was __________. Later, the news _____Dolly had become seriously ill was __________. Finally, the problem that occurred to the scientists was that a cloned animal lives _____________ the original one. Para 3 The problems of Dolly normally encouraging that as long as / shorter than / longer than disturbing shorter than

26. The word “controversial” in para 4 probably means :____________. A. complicated B. arguable C. important D. traditional Para 4 The impact of Dolly Its’ appearance raised and the media and public imagination. a storm of objections had a great impact on

27. True or false: 1 People feared that Cloned HitlersHitlers would do harm to the world. 2 All the research into human beings will be forbidden. 3 Some countries will use cloning in a wise way. Para 5People’s reaction to cloning Many governments forbade research into human beings.

28. the author does not state any personal opinion about cloning. A. Objective (be fair) B. Negative (be against it) C. Positive (be in favor of it) The writer’s attitude towards cloning Because ____________________________ _____________________________________

29. Fill in the chart about the advantages and disadvantages of cloning.

30. Advantage(good points) Dis advantage(bad points) Collecting information Cloning is beneficial to It can make more profits for We could use cloning to cure Cloning can help save Cloning can provide a copy of a child for a couple Animals clones get ill and Against nature Animals clones may develop the illness of Evil leaders may want to People are afraid that scientists will create thousands of copies of the same person. gardeners and farmers endangered animals whose child has died die young older animals clone themselves illness humans

31. Practice activity: Debate Are you in favor of cloning or against cloning? State your point of view on it. ＶＳ ForAgainst

32. Homework : 基础写作 写作情景： 今天我们班同学讨论了有关克隆的问题。 同学们热烈发表了评论和表达了自己的看法；他们主 要有两种不同的意见： 写作内容：  支持者认为克隆利大于弊，克隆技术是 21 世纪人类科 学的伟大突破。人类可以利用克隆技术培养大量品质 优良的动植物；挽救珍奇濒危动物；调节大自然的生 态平衡；可以研制高水平新药解决人类各种疾病等。  反对者认为克隆会导致动物早衰、夭折；无计划的克 隆动物会破坏生态平衡，导致一些疾病的传播 ; 邪恶 分子可能克隆自己，给人类带来灾难等。 写作要求：使用五个句子表达全部内容

33. Wish you good luck and success ahead!