单项选择题

______what to do,the man telephoned the police．

A．Not known
B．Not knowing
C．Don't know
D．Knowing not
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单项选择题
It is high time you______your membership dues．
A．paid
B．pay
C．will pay
D．to pay
单项选择题
I missed the morning train because I slept______．
A．over
B．of
C．in
D．through
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