1997年多莉羊诞生的消息宣布后便成为一项.ppt

Learning About LanguageSB Unit 2 Book 8 By YelSea 2007-5-17 P13 Learning about Language Discovering useful words and expressions Complete the following sentences using suitable words or phrases from the previous sections. Answer key for Exercise 1: I differ 2 cast down 3 accumulated 4 undertake 5 exact 6 altogether Answer key for Exercise 2: 1 Compared with her brother, she is straightforward about her opinions. 2 The arbitrary decisions of the factory leaders caused anger among the workers. 3 Is your new factory in the commercial area of Beijing? 4 Are you in favour of the governments plan to build more railway lines? 5 This is the procedure for you to have your teeth out. 6 I object to your plan because it will cost too much money. 7 Your mother and I will forbid you to stay out so late when you have homework to do. Answer key for Exercise 3: 1 undertake 2 controversial 3 satisfaction 4 cast down 5 breakthrough 6 accumulate Answer key for Exercise 4: 1C 2F 3D 4E 5B 6A Discovering useful structures Answer key for Exercise 1: I The whole scientific world followed the progress of the first successful clone, Doles the sheep. 2 Then came the disturbing news that Dolly had become seriously ill. Answer key for Exercise 2: Dolly the sheep became a scientific breakthrough when the news that it had been born was announced in 1997. However, the problem that she later developed a serious lung disease bothered scientists. On 14th February 2003 scientists made the decision that Dolly should be put to sleep. Dollys death, like her birth, was bound to raise worries. The fact that Dolly died when she was dune young disappointed people the world over. Scientists hold the belief that cloning may lead to many important scientific breakthroughs and medical treatments. But now the question comes to their minds, Did she die young because she was a clone?“ Besides that, there is also a fierce debate over the question whether human cloning experiments should be allowed. Sc