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
I think it ___________ high time they ___________ to take you more seriously.
A．was, began
B．is, should begin
C．should be, begin
D．is, began
单项选择题
Generally speaking, they had a wonderful holiday at the seaside, but the last three days were ___________ by the unexpected storm.
A．destroyed
B．wasted
C．damaged
D．spoiled
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