单项选择题

A．A popular TV program.
B．A breakthrough in technology.
C．A decent purchase.
D．A new electronics store.
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单项选择题
A．On the side of England.B．On the side of France.C．On the side of the United States.D．On the side of themselves.
A．On the side of England.
B．On the side of France.
C．On the side of the United States.
D．On the side of themselves.
单项选择题
A．The man-made building materials let out dangerous gases inside houses.B．There may be more harmful gases outside houses.C．The flow of air indoors is limited.D．Indoor air pollution can make a person seriously ill.
A．The man-made building materials let out dangerous gases inside houses.
B．There may be more harmful gases outside houses.
C．The flow of air indoors is limited.
D．Indoor air pollution can make a person seriously ill.
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