单项选择题

A．Successful business practices.
B．Famous inventors.
C．Public health concerns.
D．Unsuccessful inventions.
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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.
单项选择题
A．He is too sick to take his brother to the airport.B．He picked up his brother last night.C．His brother’s flight was canceled.D．His brother has changed his plans.
A．He is too sick to take his brother to the airport.
B．He picked up his brother last night.
C．His brother’s flight was canceled.
D．His brother has changed his plans.
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