单项选择题

Without your help, we ______ so much.

A．didn't achieve
B．would not have achieved
C．will finish
D．don't achieve
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单项选择题
______ you were busy, I wouldn't have bothered you with my questions.
A．If I realized
B．Had I realized
C．Did I have realized that
D．As I realized
单项选择题
The time will come ______ man can fly to outer space at his leisure.
A．that
B．when
C．in that
D．which
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