单项选择题

When the writer says we cannot return to the good old days, he means that（）

A．our society is becoming much worse than before
B．in our modern society it is hard to lead a quiet life
C．the old days were much happier than the present time
D．it is impossible for us to reduce noise back to previous levels

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单项选择题

Which of the following is TRUE according to the passage（）

A．Only recently did people realize the harmful effects of noise.
B．Noise pollution is the worst kind of pollution we suffer from.
C．People are now trying to find ways to reduce noise as much as possible.
D．The writer thinks that it is almost impossible for people to avoid nois

单项选择题

From the last sentence of the passage we can learn that（）

A．we can get public noise under control if we effectively draw attention to it
B．sometimes we have to shout loudly so that others can hear us
C．shouting is a chief cause of noise pollution nowadays
D．it is important to warn people of the danger of noise pollution