单项选择题

So little () about mathematics that the lecture was completely beyond me.

A. I know
B. I knew
C. did I know
D. do I know

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Your cough will get worse () you give up smoking.

A. so long as
B. on condition that
C. unless
D. otherwise
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I cannot recommend the exciting movie () strongly.

A. too
B. very
C. so
D. quite
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