1. 阅读理解

    In today's world, almost everyone knows that air pollution and water pollution are harmful to people. However, not all people know that noise is also a kind of pollution and it is harmful to human beings too.

    People who work and live under noisy conditions easily become deaf. Scientists believe that 10 percent of the workers in Britain are being deafened (变聋) by the noise where they work. Many of the workers who print newspapers and books, and who weave (织) cloth become deaf. Quite a few people living near airports also become deaf, Recently it was discovered that many teenagers in America could hear mo better than 65 year old people. for these young people like to listen to pop music and most of the pop music is a kind of noise.

    Nowadays the governments in many countries have made laws to reduce or control noise and to make it less than 85 decibels (分贝). In China, the government is trying to solve not only air and water pollution problems but also the noise pollution problem.

1. （1） The passage mainly tells us something about _______________________.

   A . air pollution B . water pollution C . noise pollution D . soil pollution
3. （2） Today scientists believe that ________________________.

   A . 90 percent of all the workers are free from any noise B . 90 percent of all the workers in Britain are not suffering from noise C . 10 percent of all the workers in Britain are working in noisy places D . 10 percent of all the workers in Britain are being deafened by the noise where they work
5. （3） People who _____________________ become deaf easily.

   A . print newspapers or books B . listen to pop music C . live near airports D . A, B and C
7. （4） Recently many teenagers could hear no better than 65 一 year 一old people in America because _____________________.

   A . they all live near airports B . their hearing is harmed by loud music C . they are younger than the old people D . their ears are still small