单项选择题

A．His suggestions and help.
B．The cruel reality and unpleasant life.
C．The responsibility of helping others.
D．The protection of others from being injured.
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单项选择题
By saying ... owners of well over half of all World Wide Web sites have set up home without fit- ting locks to their doors (Lines 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
单项选择题
A．Because the hot air has to reach a certain temperature.B．Because the house is very big.C．Because termites try to escape by hiding in wooden beams.D．Because termites may survive for a full six hours.
A．Because the hot air has to reach a certain temperature.
B．Because the house is very big.
C．Because termites try to escape by hiding in wooden beams.
D．Because termites may survive for a full six hours.
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