Born in England in 1944, Ian Wilmut____(know)as the leader of the research group that 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 thinks 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.