单项选择题

Mr. Morgan gradually ______ a knowledge of the subject.

A. attained
B. required
C. acquired
D. enquired
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单项选择题
The new government's tax raise policy actually led to the result that the incomes from taxation actually ______.
A. shrink
B. delay
C. disperse
D. sink
单项选择题
The meeting was so prolonged and exhausting that ______ the speakers stopped for refreshments.
A. at large
B. at ease
C. at intervals
D. at random
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