单项选择题

If you carefully______the problem again, you will find a way out.

A．think over
B．take over
C．set up
D．look up
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单项选择题
He learned how to use sign language to______with deaf customers.
A．connect
B．contact
C．communicate
D．relate
单项选择题
______, we decided to leave at once, as we didn’ t want to risk missing the bus.
A．As it being pretty late
B．It being pretty late
C．It was being pretty late
D．Being pretty late
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