单项选择题

Cats sleep________day and hunt________night.

A．in, in
B．at, at
C．during, during
D．by, by
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单项选择题
_______is often the case, the girl forgot to bring her dictionary.
A．As
B．Such
C．That
D．It
单项选择题
I suppose that they do not have a clear idea who________the story.
A．originated
B．generated
C．manufactured
D．estimated
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