Almost everyone knows that air pollution is {#blank#}1{#/blank#} (危险的) to people's health. However, not all people know that noise is a kind of pollution {#blank#}2{#/blank#} (也).

    A person who works and {#blank#}3{#/blank#} (居住) in a noisy place often talks in a loud {#blank#}4{#/blank#} (嗓音) so that other people can hear him. Lots of people living near airports can hardly hear anything. Many {#blank#}5{#/blank#} (年轻的) people in America can hear no better {#blank#}6{#/blank#} (比) old people, because they always listen to loud {#blank#}7{#/blank#} (流行的) music.

    What's more, machines and {#blank#}8{#/blank#} (小汽车) are producing much noise all the time. In China, the government is {#blank#}9{#/blank#} (努力) to do something to {#blank#}10{#/blank#} (阻止) the noise pollution, and return the good environment to people.