北师大版高中英语选修七nit 21 Human Biology.doc

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参考答案：

Advantages of cloning … Disadvantages of cloning 1. Medical coning could produce cures for 1. Animal clones may develop the illness of serious illnesses in humans. older animals. 2. Cloning plants can produce plants of similar 2. Animal clones may die younger than the quality for sale. donor animals. 3. Cloning plants can be useful for research on 3. There are moral disagreements about cloning. new plant species. 4. Cloning can help save animals in danger. … 4. Evil leaders may want to clone themselves. … 课堂同步练习 Ⅰ. 单词拼写

1. He writes a w______________ letter to his parents.

2. That is only a t_________________ (暂时的) solution to the problem.

3. I’ll give you an injection and the tooth will go completely n_______________. 4. The Koran is the _____________ (神圣的) book of Muslims.

5. His illness r_________________ him of the chance to play for his country. 6. The standard of education has _______________ (下降) in this country. 7. I need a m_______________ of sever hours’ sleep. 8. She was fully e__________________ for the climbing.

9. I always spend a _________________ (大笔钱财) on presents at Christmas.

10. I made _____________ (询问) about my lost umbrella in all the stores I had visited. 11. Applications must be _______________ by 31 March.

12. She showed a great deal of __________________ (担心) for her son’s illness. 13. Very few MPs _____________ against the new law.

14. We need to know the exact s_________________ surrounding the accident.

15. Don’t be ______________ (荒谬的)！I can’t possibly do all this work in one day. Keys:

1. weekly 2. temporary 3. numb 4. sacred 5. robbed 6. declined 7. minimum 8. equipped 9. fortune 10. enquiries 11. submitted 12.concern 13. voted 14 circumstances 15. absurd

Ⅱ.基础写作 [写作内容]

以My opinion about cloning为题目，根据下列提纲，写一篇关于克隆的短文。 1． 我赞成克隆技术。

2． 克隆技术是一门新兴的学科，需要更大的发展。

3． 克隆技术有可能使已经消失的动物重新回到地球上。 4． 克隆技术使目前尚未能治愈的疾病找到新治疗方法。 5． 克隆技术可使丧失运动或思维能力的人重获新生。

[写作要求]

1．必须使用5个完整规范的句子介绍全部内容; 2．将5个句子组成连贯的短文. 参考答案：

I’m strongly in favor of cloning. As we all know, cloning is a new science so it needs a lot of room for development and scientists need a little encouragement. With the development of cloning, scientists may find ways to cure serious illnesses that have no cure at the moment. In addition, people who have lost their ability to move or think could be helped by medical cloning. Finally we may soon be able to bring back extinct animals back to life on earth.