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F
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单项选择题
A．15 points.B．30 points.C．45 points.D．75 points.
A．15 points.
B．30 points.
C．45 points.
D．75 points.
单项选择题
A．We are making too many vehicles.B．We have more and more industry.C．There are too many developing countries.D．People use too many man-made materials.
A．We are making too many vehicles.
B．We have more and more industry.
C．There are too many developing countries.
D．People use too many man-made materials.
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