Pollution means adding dirty or harmful things to land, air, water and so on. As a result, they are no longer pleasant or safe to use. Pollution is bad for animals and plants, and it even makes people’s health in danger. In our daily life, we can see different kinds of pollution in many places. There are three main forms of pollution: land pollution, air pollution and water pollution.
Land pollution is caused by solid waste, such as cans, bottles and some plastic things which aren’t broken down quickly. It makes the environment look very bad. However, air pollution is more serious than land pollution. It is much worse in cities and towns because of the fumes(废气) from traffic and the waste from human activities. When people drive their cars, fumes which are most made up of CO2, NO2 and SO2 are given off. After the gases get into the air, they may mix with clouds. Then they will become some harmful chemicals (化合物) falling on the ground with rain. It is one of the reasons for soil erosion (土壤侵蚀) which is one example of water pollution.
Various kinds of pollution will cause many health problems. People have realized they must change this serious situation. There are many ways to control pollution. To develop alternative energy is very popular in many countries. China, for example, has made up its mind to be a leader in this field. It is trying hard to make full use of energy from the sun and wind. It has paid plenty of money to make electric cars and trains instead of traditional traffic. We should also take action to make our environment cleaner every day. Take cloth bags while going shopping and drive cars less. We have only one earth. We must take steps now to help protect our environment for the future wherever we are.
小题1:How many main forms of pollution are mentioned in the passage?
A．Two.
B．Three.
C．Four.
D．Five.小题2:Why is air pollution much worse in cities and towns?
A．Because of the cans and bottles that people throw away.
B．Because of the plastic things which aren’t broken down quickly.
C．Because of the fumes made up of SO2, CO2 and O2.
D．Because of the waste from human activities and the fumes from traffic.小题3:Which of the following is TRUE according to the passage?
A．Pollution hardly does harm to humans.
B．China doesn’t want to develop alternative energy.
C．Air pollution will cause soil erosion and water pollution.
D．Land pollution is only caused by solid waste.小题4:To make our environment cleaner, we shouldn’t __________.
A．use cloth bags while shopping
B．ride a bike to school
C．drive a car out every day
D．go to work on foot小题5:The main idea of this passage is _________.
A．to introduce different forms of pollution and ways to control it
B．to introduce the harmful chemicals and the solid waste
C．to introduce the alternative energy and the ways to use it
D．to introduce the electric cars and traditional traffic
小题1:B
小题2:D
小题3:C
小题4:C
小题5:A
题目分析：这篇短文主要介绍了造成环境污染的三种形式及保护环境的一些措施。
小题1:根据第一段There are three main forms of pollution: land pollution, air pollution and water pollution.描述，可知选B。
小题2:根据第二段However, air pollution is more serious than land pollution. It is much worse in cities and towns because of the fumes(废气) from traffic and the waste from human activities. 描述，可知选D。
小题3:根据第二段However, air pollution is more serious than land pollution. …… is one of the reasons for soil erosion (土壤侵蚀) which is one example of water pollution.描述，可知选C。
小题4:根据最后一段We should also take action to make our environment cleaner every day. Take cloth bags while going shopping and drive cars less. 描述，可知选C。
小题5:这篇短文主要介绍了造成环境污染的三种形式及保护环境的一些措施。故选A。
点评：本文浅显易懂，层次分明，学生很容易把握文章中心内容。答题中注意带着问题阅读短文，一般就能顺利找出答题依据。对于不能直接找到根据的问题注意联系上下文，根据短文中心总结出正确答案。