单项选择题

If you ______ a moment, I'll ask the manager to talk with you about the recent develop ments of the factory.

A．waited
B．are waiting
C．wait
D．have waited
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单项选择题
______ in my brother's position, I would have hung up the phone in the middle of the conversalion.
A．Had I have been
B．Had I been
C．Have I been
D．If I been
单项选择题
I don't think he will hand in the examination paper before the bell rings,______
A．do I
B．don't I
C．will he
D．won't be
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