单项选择题

You ______ not have seen her yesterday, for she was abroad.

A．must
B．should
C．could
D．would
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单项选择题
I don't think Mary understood what you said, ______
A．do I
B．didn't she
C．did you
D．did she
单项选择题
She says she'd rather he ______ tomorrow instead of today.
A．leaves
B．left
C．leave
D．would leave
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