单项选择题

Find the same meaning as "erase" in the last sentence of the first paragraph.

A．Add.
B．Change.
C．Remove.
D．Store.
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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
单项选择题
They are trying to work out a ______ to the problem.
A．satisfaction
B．solution
C．concentration
D．attention
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