单项选择题

The problem has been ______ my mind all day.

A. preying on
B. getting at
C. taking on
D. seeing to
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单项选择题
Every modem government, liberal or otherwise, has a specific position in the field of ideas; its stability is vulnerable to critics in proportion to their ability and persuasiveness.
A. futile
B. susceptible
C. feasible
D. flexible
单项选择题
There was nothing we could do ______ wait.
A. or rather
B. but rather
C. rather than
D. other than
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