单项选择题

They overcame all the difficulties and completed the project two months ahead of time, ______ is something we had not expected.

A．which
B．it
C．that
D．what
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She would have been more agreeable if she had changed a little bit, ______
A．hadn't she
B．hasn't she
C．wouldn't she
D．didn't she
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The tenant left nothing behind except some ______ of pager, cloth, etc.
A．sheets
B．scraps
C．pages
D．slices
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