单项选择题

Mrs. White made me ______ the work again.

A．do
B．to do
C．doing
D．done
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单项选择题
You must have seen the film last night, ______
A．didn't you
B．mustn't you
C．needn't you
D．do you
单项选择题
Every policeman and fireman ______ on the alert.
A．have been
B．was
C．are
D．were
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