单项选择题

Great efforts must be made if the war ___________ avoided.

A．will be
B．can be
C．has been
D．is to be
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单项选择题
There was a ___________ of his latest novel in a local newspaper immediately after its publication.
A．comment
B．review
C．remark
D．revision
单项选择题
You should take an umbrella with you ___________ it rains.
A．in case
B．because
C．provided
D．if
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