单项选择题

It is generally thought to be of importance to a man that he （） himself.

A. knew
B. know
C. knows
D. must know

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单项选择题
The curious children watched the towers （）.

A. erected
B. be erected
C. to be erected
D. being erected
单项选择题
I regret （） him a thief, but I regret even more his stealing my watch!

A. to call
B. to have called
C. having called
D. called
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