【正文】
ears ago, the problem was not so serious because there were not so many people. Man is now slowly polluting the whole world.Air pollution is still the most serious. It’s bad to all living things in the world. Water pollution kills our fish and pollutes our drinking water. Noise pollution makes us bee angry more easily. The pollution of SO2 is now the most dangerous problem of air pollution. It is caused by heavy traffic. It is sure that if there are fewer people driving, there will be less air pollution.Many countries are making rules to fight pollution. They stop people from burning coal(煤)in houses and factories in the city. So the less pollution there is, the better life people will have.1. Our world is being much smaller _____A. because of science development B. because there are fewer peopleC. because the earth is being polluted day and night2. Thousands of years ago, life was _____ it is today.A. easier than B. as easy as C. harder than 3. Pollution es in many ways. We can even hear it. Here “it” means _____.A. air pollution B. noise pollution C. water pollution4. Air pollution is the most serious kind of pollution because _____A. it makes much noise B. it’s bad to all living things in the world C. it has made our rivers and lakes dirty5. Which of the following is NOT true?A. Many countries are making rules to fight pollution. B. The pollution of the earth grows as fast as the world’s population does.C. The problem of pollution is not so serious because there are so many people.6