单项选择题

You look tired; you() have stayed up late last night.

A．should
B．must
C．would
D．may

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单项选择题
--Sorry, I made a mistake again.-- (). Practice more and you'll succeed.

A．Not at all
B．Certainly not
C．Never mind
D．Don't mention it
单项选择题
All the students () John went to the park on Sunday. He was ill.

A．besides
B．except
C．with
D．without
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