题目内容

Last year Sam earned _______his brother.

A. twice as more
B. twice as many as
C. more twice than
D. twice as much as

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I have no doubt ________he will overcome all his difficulties.

A. if
B. that
C. as to
D. whether

I heard Tom _______ (sing) in his room.

The machine _________ (export) to Italy needs repairing.

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