单项选择题

There are some more topics to discuss ______ the problem of pollution.

A．generally
B．exactly
C．especially
D．probably
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单项选择题
John's success in his career will be a great ______ to his aged parents.
A．satisfaction
B．attraction
C．concentration
D．solution
单项选择题
He found it difficult to ______ the fact that the ship was lost in a heavy storm.
A．receive
B．keep
C．obtain
D．accept
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