单项选择题

—I didn't see her yesterday.
—Oh, but you ______.

A．must have
B．ought to
C．should have
D．cannot have
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单项选择题
Returning to the room, ______.
A．the book was lost
B．I found the book missing
C．the book was missing
D．I found the losing book
填空题
A．water B．what C．wash D．wallet
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