单项选择题

______that this region was so rich in natural resources.

A．Little he knew
B．Little did be know
C．Little he did know
D．Little he had known
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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
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
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