单项选择题

______ is generally accepted, economic growth is determined by the smooth development of production.

A．What
B．That
C．It
D．As
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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
单项选择题
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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