单项选择题

—I saw Mary in the library yesterday.
—You （）her, she is still in hospital.

A. mustn’t have seen
B. could not see
C. can’t have seen
D. must not see

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单项选择题
If we （）sooner, we might have got there.

A. started
B. had started
C. would have started
D. start
单项选择题
Mary’s dress cost （）Alice’s.

A. twice more
B. two times more as
C. twice as much as
D. twice as more
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