单项选择题

Scientists are ______ certain that there is a cancer--inhibiting agent in the blood of the shark.

A．dubiously
B．virtually
C．queerly
D．randomly
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单项选择题
Since she was alone, she opened the door ______ , leaving the chain lock fastened.
A．warily
B．consciously
C．audaciously
D．recklessly
单项选择题
The republication of the poet's most recent works will certainly ______ his national reputation.
A．magnify
B．strengthen
C．enlarge
D．enhance
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