单项选择题

For over a million years, our forefathers were basically ______.

A．successful farmers
B．co-operating hunters
C．runners and jumpers
D．skillful sportsmen
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单项选择题
It is essential for a policeman to be trained in criminal law ______.
A．so that he can catch criminals in the streets
B．because many of the criminals he has to catch are dangerous
C．so that he can justify his arrests in court
D．because he has to know nearly as much about law as a professional lawyer
单项选择题
The word confrontation in the last paragraph most probably means ______.
A．opposition
B．determination
C．protection
D．confusion
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