单项选择题

This box is ___________ that one.

A．twice as heavy as
B．as twice heavy as
C．twice heavy than
D．as heavy as twice
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单项选择题
He is said ___________ much progress in his studies since last year.
A．to make
B．to have made
C．to be making
D．making
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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