题目内容
（请给出正确答案）
Air pollution is the most serious kind of pollution because ______.
A．it's bad for all living things in the world
B．it makes much noise
C．it makes our rivers and lakes dirty
D．it makes us angry more easily
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Because of the reduction of air pollution, this city now is a good place _______
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Air pollution, together with overpopulation, ______ many problems in big cities today.
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A．a good place in which to live
B．a good place to live in
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[A] disposition
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