单项选择题

A body, ______ it is in motion, would never stop itself if there were no friction.

A．where
B．by time
C．once
D．at the moment
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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
单项选择题
Last year, the crime rate in Chicago has sharply ______.
A．declined
B．lessened
C．descended
D．slipped
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