单项选择题

But for your help, I _________ my work yesterday.

A．can't finish
B．wasn't able to finish
C．couldn't finish
D．couldn't have finished
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Weather _________, we'll have an outing tomorrow.
A．permits
B．permitted
C．permitting
D．permit
单项选择题
All the class burst _________ laughter when they saw the funny picture.
A．in
B．at
C．on
D．into
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