单项选择题

According to the passage, all the damage listed below could be done by a hacker EXCEPT ______.

A．entering into computers illegally
B．creating many electronic-age terms
C．removing computer systems
D．going through computer systems
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单项选择题
They are trying to work out a ______ to the problem.
A．satisfaction
B．solution
C．concentration
D．attention
单项选择题
During the examination you are supposed to stay in your seats, to keep your eyes on your papers, ______ to anyone.
A．but could not talk
B．not talk
C．and not to speak
D．rather than
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