单项选择题

______ percentage of working women in the United States has doubled since 1940 has been the result of both economic and social factors.

A．The
B．That the
C．There is the
D．It is the
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单项选择题
Bob needs a tutor because it is important ______ on his exam next month.
A．that he do well
B．for him do well
C．he does that well
D．that he will do well
单项选择题
No students ever touched him ______ they respected him.
A．for
B．but
C．nor
D．so
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