单项选择题

This conversation probably took place

A．in an office.
B．in a public place.
C．on the phone.
D．in a car.
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单项选择题
Why may partial theories be completely wrong
A．It doesn’t work to investigate a problem.
B．Everything is so intertwined that it’s hard to break a problem up into bits.
C．The sum of the partial theories may disagree with the full solution to a problem.
D．They have not been proved as scientific.
单项选择题
Fred’s friend Para actually knows quite about Fred’s story because
A．other people have told him about it.
B．he happened to be on the same plane.
C．he watched the news on TV.
D．he read Fred’s article in the New York Times.
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