单项选择题

Sean could not help _______ at the end of sad movie.

A．cry
B．to cry
C．crying
D．cries
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单项选择题
It _______ since this morning.
A．was raining
B．is raining
C．raining
D．has been raining
单项选择题
_______ of them was good enough to use.
A．None
B．Most
C．Not all
D．Not most
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