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
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The time will come ______ man can fly to outer space at his leisure.
A．that
B．when
C．in that
D．which
单项选择题
The doctor soon made the worried patient feel ______ ease.
A．with
B．at
C．on
D．grown
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