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Because the world is becoming more and more noisy. Because they have learned that noise is also a kind of pollution. Because noise is an unwanted waste for human beings. Because people knew little about noise before.
Only recently did people realize the harmful effect of noise. Noise pollution is the worst kind of pollution we suffer from. People are now trying to find ways to make noise as low as possible. The writer thinks that it is almost impossible for people to avoid noise.
His voice was drowned by the noise His voice being drowned by the noise Drowned by the noise His voice drowned by the noise
Only recently did people realize the harmful effect of noise. Noise pollution is the worst kind of pollution we suffer from. People are now trying to find ways to make noise as low as possible. The writer thinks that it is almost impossible for people to avoid noise.
did the noise stop the noise stopped that the noise stopped that did the noise stop
enjoy hearing airplanes taking off and landing are usually not troubled by the noise can easily tell sound from noise can be measured by machines
Because the world is becoming more and more noisy. Because they have learned that noise is also a kind of pollution. Because noise is an unwanted waste for human beings. Because people knew little about noise before.
can be measured in the same way that "noise" is measured may be extremely harmful to health is not at all different from "noise" can be measured by machines
noisy; careful noise; careless noise; carefully noise; careful
asleep excited alone awake
we can put noise under control if we take effective measures sometimes we have to shout loudly so that others can hear us shouting is the chief cause of noise pollution nowadays it is important to warn people of the danger of noise pollution
They made so many noise So loudly they talked It was so noise outside Such a loud noise did they make
had kept is keeping has kept kept
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