A. It will reduce the amount of pollutants in the air.B-找考题网

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A. It will reduce the amount of pollutants in the air.
B. It will increase the amount of unpleasant odors from vehicles.
C. It will eventually destroy the ozone layer.
D. It will reduce the cost of running large vehicles.

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A. They are made of metal and glass. B. They cost about $50.C. They are usually found on the roof. D. They look like sandwiches.

A. They are made of metal and glass.
B. They cost about $50.
C. They are usually found on the roof.
D. They look like sandwiches.

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