Cloningisawayof1.

问题详情：

Cloning is a way of 1. ________ (make)an exact copy of another animal or plant. It has two major uses. One is 2. ________ gardeners use it to produce commercial quantities of plants. The 3. ________ is that it is valuable for research on new plant species and for medical research on animals. 4. ________, the process of cloning is difficult 5. ________ (undertake).

The first successful clone, Dolly the sheep, made the whole 6. ________ (science)world follow its progress, though it had 7. ________ problems than the normal sheep. On the other hand, Dolly’s appearance 8. ________ (raise)a storm of objections and had a great impact 9. ________ the media and public imagination. Different people have different opinions on it. However, scientists still wonder

10. ________ cloning will help or harm us and where it is leading us.

【回答】

1. making   2. that   3. other    4. However  5. to undertake 

6. scientific  7. more   8. raised   9. on  10. whether

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