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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A. except
B. but
C. without
D. besides

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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

—Tom, you are caught late again. —Oh,（）A. not at a...

单项选择题—Tom, you are caught late again.
—Oh,（）

A. not at all
B. just my luck
C. never mind
D. that's all right