D. power

　　54．A. established

　　B. found

　　C. passed

　　D. allowed

　　55．A. possible

　　B. clear

　　C. necessary

　　D. proper

　　56．A. disappeared B. changed

　　C. ended

　　D. spread

　　57．A. evidence B. money

　　C. advice

　　D. doubt

　　58．A. From

　　B. Like

　　C. For

　　D. Without

　　59．A. saving

　　B. sending

　　C. including

　　D. costing

　　60．A. cared about

　　B. looked for

　　C. belonged to

　　D. relied on

　　As I understand, if scientists produced a human clone, there would be a great risk of it having a disease. Nobody seems to understand the ageing process of a clone. It would be terrible if a baby was the age of its parent at

　　31

　　. Its cells would grow old fast and it would die young.

　　32

　　until the technique is perfectly safe, it should be

　　33

　　.

　　I'd love to have a clone of

　　34

　　. I often wish I had a twin sister, someone who

　　35

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