单项选择题

By saying"...owners of well over half of all World Wide Web sites have set up home with out fitting locks to their doors" (Line 3-4, Para.2), the author means that______.

A．those happy times appear still to be with us
B．there simply wasn't any crime to worry about
C．many sites are not well-protected
D．hackers try out tricks on an Internet site without actually breaking in

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单项选择题

Farmer's program has been criticized by the public because______.

A．it causes damage to Net browsers
B．it can break into Internet sites
C．it can be used to cause disorder on all sites
D．it can be used by people with evil intent

单项选择题

Why do working conditions generally remain bad

A．The workers are quite satisfied with them.
B．No one can decide what to do about them.
C．Managers see no need to change them.
D．Office workers want to protect their position.