单项选择题

She ______ on her way to school．I just phoned her home and no one answered me．

A．should be
B．must be
C．might have been
D．could be
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单项选择题
It is during his spare time ______ John has been studying a course in French．
A．when
B．that
C．which
D．what
单项选择题
Her face is ______ to me，but l can’t remember where I saw her．
A．similar
B．friendly
C．alike
D．familiar
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