单项选择题

"We' re late and the play has started."" I wonder how long ago______."

A．did it begin
B．it began
C．was it beginning
D．it has begun
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单项选择题
Although he thought he was helping us to prepare the dinner, he was actually______ the way.
A．in
B．off
C．by
D．on
单项选择题
I______ the book. I may well borrow one from the library.
A．need to have bought
B．need have bought
C．needed not bought
D．needn't have bought
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