(2013·安徽合肥二模)—The cars give off a great deal of waste gas in the streets.—Yes. B

题干

(2013·安徽合肥二模)—The cars give off a great deal of waste gas in the streets.
—Yes. But I'm sure something will be done to ________ air pollution.

A．reduce	B．remove
C．collect	D．warn

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