单项选择题

But you have to study hard, ().

A. mustn't you
B. won't you
C. don't you
D. oughtn't

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单项选择题
It was because the applicant was too conceited (自负的) () he failed in the interview.

A. that
B. so that
C. so
D. therefore
单项选择题
Do you think Stephen Hawkins is the greatest man ().

A. alive
B. lively
C. live
D. living
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