单项选择题

"May I speak to your manager Mr. Williams at five o'clock"
"I'm sorry. Mr. Williams（）to a conference long before then."

A．will have gone
B．mustn't follow
C．couldn't have been following
D．shouldn't have been following

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单项选择题
I（）have gone with them, but I（）not finish my homework in time.

A．would, did
B．should, might
C．might, should
D．did, would
单项选择题
When they were in difficulty, we would come to（）help.

A．the villagers'
B．the villagers
C．the villagers of
D．the villagers for
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