单项选择题

We learn from the passage that animal clones am likely to have______.

A．an abnormal shape
B．a bad temper
C．defective organs
D．immune deficiency
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单项选择题
What does the first paragraph tell us about Westhusin's dog cloning project
A．Its success is already in sight.
B．It is doomed to utter failure.
C．It is progressing smoothly.
D．Its outcome remains uncertain.
单项选择题
It can be seen that present cloning techniques______.
A．provide insight into the question of nature vs. nurture
B．have been widely used in saving endangered species
C．have proved quite adequate for the cloning of humans
D．still have a long way to go before reaching maturity
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