单项选择题

Several questions on this plan （） at the meeting.

A. have proposed
B. has proposed
C. have been proposed
D. has been proposed

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单项选择题
I wish my sister （） in Chongqing for one more week.

A. could stay
B. stays
C. is staying
D. has stayed
单项选择题
Mary's eyes are red. She （） crying.

A. may
B. must have been
C. is
D. should be
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