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第3部分：概括大意与完成句子 (第2卜30题，每题1分，共8分) 阅读下面这篇短文，短文后有2项测试任务：(1)第23~26题要求从所给的6个选项中为第1～4段每段选择1个正确的小标题;(2)第27~30题要求从所给的6个选项中选择4个正确选项，分别完成每个句子。请将答案涂在答题卡相应的位置上。 Cloning(克隆)：Future Perfect? 1 A clone is all exact copy of a plant or animal produced from any one cell. Since Scottish scientists reported that they had managed to clone a sheep named Dolly in 1997，research into cloning has grown rapidly.In May 1998，scientists in Massachusetts managed to create two identical calves(牛犊)using cloning technology.A mouse has also been cloned successfully， But the debate over cloning humans really started when Chicago physicist Richard Seed made a surprising announcement：We will have managed to clone a human being within the next two years，he told the world. 2 SeedS announcement provoked a lot of media attention，most of it negative.In Europe，nineteen nations have already signed an agreement banning human cloning and in the US the President announced：We will be introducing a law to ban all human cloning and many states in the US will have passed anti-cloning laws by the end of the year. 3 Many researchers are not so negative about cloning，They are worried that laws banning human cloning will threaten important research.In March，The New England Journal of Medicine called any plan to ban research on cloning humans seriously mistaken.Many researchers also believe that in spite of attempts to ban it，human cloning will have become routine by 2010 because it is impossible to stop the progress of science. | 
