单项选择题

When she was awake, she found that she was standing on ______ seemed to be a piece of stone.

A．that
B．which
C．what
D．it
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单项选择题
The door______. We'd better have it repaired.
A．isn't shut
B．hasn't been shut
C．won't be shut
D．won't shut
单项选择题
You______ television. Why not do something more meaningful
A．always watch
B．are always watching
C．have always watched
D．have always been watching
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