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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