单项选择题

Nobody can do two things well（）

A．at one time
B．at once
C．one time
D．once

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单项选择题
We can't be delayed（）. We must hurry.

A．after a moment
B．for a moment
C．in a moment
D．in the moment
单项选择题
I'm glad to say that he's already finished（）50% of the book in these past three days.

A．no less than
B．no more than
C．not more than
D．much less than
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