单项选择题

None of you ______ to stay until the game is over, if you don't want to.

A．must
B．needn't
C．has
D．haven't
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单项选择题
John isn't here. He's on assignment in New York. So the person you spoke to this morning ______ have been John.
A．must
B．might
C．might not
D．can't
单项选择题
He is always complaining about one thing or ______.
A．others
B．something
C．another
D．everything
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