单项选择题

A．Either men or women are always introduced to the newcomer.
B．Girls over eighteen are introduced to older people.
C．A man is introduced to a woman if she is over eighteen.
D．The young are introduced to the old if they are of different sexes.
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单项选择题
A．Jack’s father married at a younger age than Jack.B．Jack’s parents are better off.C．Jack and Anne spent a lot of time on house-hunting.D．The building site is not to be far from where Jack works.
A．Jack’s father married at a younger age than Jack.
B．Jack’s parents are better off.
C．Jack and Anne spent a lot of time on house-hunting.
D．The building site is not to be far from where Jack works.
单项选择题
A．Ozone is not always associated with acid rain.B．Cold weather would make the effects of pollution worse.C．Many industries are unwilling to accept responsibility for air pollution.D．Plants in warm weather are dying faster.
A．Ozone is not always associated with acid rain.
B．Cold weather would make the effects of pollution worse.
C．Many industries are unwilling to accept responsibility for air pollution.
D．Plants in warm weather are dying faster.
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