单项选择题

According to the passage, acid rain is

A．a source of pollution.
B．an effect of industrialization.
C．an advantage of industrial society.
D．a deposition of fossil fuels.

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单项选择题

The author seems, in the last paragraph of this passage,

A．to alarm us against the terrible effects of acid rain.
B．to suggest that there are some ways to solve the problem.
C．to urge us to pass alternative stricter laws on pollution.
D．to remove the effects of acid rain from all around us.

单项选择题

A．immediately kills trees and affects aquatic life in lakes and rivers.
B．deposits various metals iron, mercury, aluminum into the soil.
C．kills forests by weakening them and reduces fish populations.
D．releases sulfur dioxide, nitrogen oxide and into the atmospher

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