普通高中课程标准实验教科书 英语选修8 Unit 2 Reading Task

　　It took 29 embryos to produce Dolly the sheep and that was nearly ten years ago. But the situation has not got better for mammal cloning. It seems that the problems for human cloning will be even more serious as no human has yet been cloned. It is obvious that we must be very cautious about medical cloning until these problems are solved.

　　We hope you will agree with us and support our point of view. Thank you.

　　A debate is an activity in which students can discuss two sides of an issue. It is a sort of competition with a chairperson in charge to make sure of fair play. The chairperson introduces the topic of the debate and then one person from each side has a chance to begin the argument. After that, the issue can be discussed by anyone in the room one at a time. While having a debate there are several things to remember:

　　◎the person who is leading the team that supports the topic will speak first

　　◎the person who is leading the team that disagrees with the topic will speak next

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