单项选择题

She was punished（）she should make the same mistake again.

A. unless
B. if
C. provided
D. lest

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单项选择题

All the students in this college are supposed to（）with the regulation.

A. acquaint
B. observe
C. comply
D. consent

单项选择题

Hope of becoming an A student is his incentive （） hard work.

A. to
B. in
C. for
D. of

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