单项选择题

A．Successful business practices.
B．Famous inventors.
C．Public health concerns.
D．Unsuccessful inventions.
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填空题
S1. The reason why many production processes were taken over by the marketplace was that _____.
单项选择题
A．She did better on the quiz than the man did.B．She did not have to take the quiz.C．She has not yet received her grade on the quiz.D．She did not do well on the quiz.
A．She did better on the quiz than the man did.
B．She did not have to take the quiz.
C．She has not yet received her grade on the quiz.
D．She did not do well on the quiz.
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