单项选择题

It is time that the children ______.

A．went to bed
B．should go to bed
C．going to bed
D．have to go to bed
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单项选择题
______ the United States Yes, we went there on business last month.
A．Did you go
B．Have you gone to
C．Have you ever been to
D．When did you visit
单项选择题
Finding the police's coming, all the thieves ran away ______ all directions.
A．on
B．in
C．from
D．to
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