单项选择题

We've done once but failed. We'll have to do it ______ time. ( )

A．a second
B．the second
C．the twice
D．twice
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单项选择题
Mary, along with her parents, ______ to Paris. ( )
A．have moved
B．has moved
C．are moving
D．have been moving
单项选择题
The door was ______ and I could not see who she was talking to . ( )
A．shut
B．shutted
C．shutting
D．being shut
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