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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—Tom，you are caught late again.—Oh，（）.

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B. just my luck
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—What do you think of the concert —I really enjoy it. I didn't expect it was ______ wonderful.
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