单项选择题

We didn't finish the work in time. You _______us since you were there.

A． might help
B． should help
C． could have helped
D． must have helped
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_______is often the case, one third of the workers have over fulfilled the production plan.
A． What
B． This
C． That
D． As
单项选择题
The weather report says that there will be a storm _______two days.
A． until
B． before
C． in
D． by
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