单项选择题

He was ______ busy to help me at the moment.

A. too
B. enough
C. very
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单项选择题
Almost no one fails ______ his driver's test on the first day.
A. pass
B. passing
C. to pass
单项选择题
I'm not sure if it ______ tomorrow, if it ______, I won't go fishing.
A. rain, rains
B. will rain, rains
C. rains, will rain
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