单项选择题

I bought this computer two weeks ago, but it isn't working as it （）.

A.can
B.would
C.need
D.should

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单项选择题

--I usually go to Cambridge by train. --Why （）by coach for a change？

A.trying to go
B.to try going
C.try going
D.to try to go

单项选择题

Both sides could make these talks succeed （）seeking common ground.

A.with
B.at
C.for
D.by

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