单项选择题

Passage One
Questions 26 to 29 are based on the passage you have just heard.

A．They invade the computer and make it a place for manufacturing.
B．They infect the hard disc and the whole system.
C．They spread throughout the whole system by quickly copying themselves.
D．They spread viruses inside the computer system.
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单项选择题
A．It’s too broad to cope with.B．It’s a bit outdated.C．It’s controversial.D．It’s of little practical value.
A．It’s too broad to cope with.
B．It’s a bit outdated.
C．It’s controversial.
D．It’s of little practical value.
单项选择题
A．To drink as much as possible each day.B．To drink eight glasses of water daily.C．To drink as actually needed.D．To drink no more than eight glasses daily.
A．To drink as much as possible each day.
B．To drink eight glasses of water daily.
C．To drink as actually needed.
D．To drink no more than eight glasses daily.
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