单项选择题

It can be inferred from the text that the synthesizing DNA technology should be used

A．extravagantly and freely.
B．flexibly and excessively.
C．reasonably and cautiously.
D．openly and vigorously.
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单项选择题
The expression hew very closely to can be best replaced by
A．"shed light on".
B．"adhere strictly to".
C．"stay away from".
D．"give play to".
单项选择题
Keneally's biography is intended mainly to
A．launch a surprise attack on Democratic congressman.
B．show sympathy for an abused but reputed lady, Teresa.
C．curse bitterly at the hypocrisy of notorious heroes.
D．expose the true character of a civil war general.
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