Born in England in 1944, Ian Wilmut____(know) as the leader of the research group than first cloned a female lamb ____ (call) Dolly in 1996. Dolly became famous and pictures of her appeared on the ____ (cover) of magazines all over the world. The ____ (possible) of reproduction without a male and female being involved also made her the focus of a moral debate. For scientists, however, the cloning of dolly using the DNA of an adult cell was a breakthrough ____showed the cloning of special animals was possible.

    However,____Wilmut think unlikely is human cloning. He says ____ (undertake) the procedure with humans would require 29 surrogate（替代的）mothers and 300 eggs. Of those 29, 28 would be bound ____(experience) failure and suffer physically and emotionally. He says he is also concerned about the psychological and ____(society) consequences a cloned might have to go through. For these reasons, he is not____ favor of it.