单项选择题

______ to do the work, I should do it some other day.

A．If were I
B．I am
C．If I were
D．Was I
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单项选择题
It is necessary that the project ______ within time limited.
A．be finished
B．is finished
C．finished
D．has finished
单项选择题
I think it s time we ______ strict measures to stop pollution.
A．will take
B．take
C．took
D．have taken
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