单项选择题

Michael failed the exam. He（）have spent so much time playing computer games and chat ring online.

A. mustn't
B. couldn't
C. wouldn't
D. shouldn't

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单项选择题
It is suggested that the question（）at the next meeting.

A. should discuss
B. be discussed
C. should have been discussed
D. being discussed
单项选择题
She is（）far the most active member in our group.

A. so
B. as
C. by
D. in
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