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。 Cloning (克隆): Future Perfect 1 A
clone is an 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 Seed’s 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. 4 Is there reason to
fear that cloning will lead to a nightmare world The public has been bombarded
(轰炸) with newspaper articles, television shows and films, as well as cartoons.
Such information is often misleading, and makes people wonder what on earth the
scientists will be doing next. 5 Within the next five to ten years
scientists will probably have found a way of cloning humans. It could be that
pretty soon we will be able to choose the person that we want our child to look
like. But how would it feel to be a clone among hundreds, the anti-cloners ask.
Pretty cool, answer the pro-cloners (赞成克隆的人). Paragraph 2 ______.