单项选择题

The engineers made two big plans for the dam, （）was never put in force.

A. one of them
B. which
C. one of which
D. every one of which

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单项选择题
Jack felt unhappy as they all went outing （）him.

A. except
B. but
C. without
D. besides
单项选择题
As time went by, the plan stuck （）fairly practical.

A. to proved
B. to proving
C. proved
D. to be proved
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