摘要:73.It’s bad to talk with others with a mouthful of food.

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Hundreds of years ago, life was much harder than it is today. People didn’t have modern machines. There was no modern medicine, either.

Life today has brought new problems. One of the biggest is pollution. Water pollution has made our rivers and lakes dirty. It kills our fish and pollutes our drinking water. Noise pollution makes us talk louder and become angry more easily. Air    pollution is the most serious kind of pollution. It’s bad to all living things in the world.

Cars, planes and factories all pollute our air every day. Sometimes the polluted air is so thick that it is like a quilt over a city. This kind of quilt is called smog.

Many countries are making rules to flight pollution. Factories must now clean their water before it is thrown away, and they mustn’t blow dirty smoke into the air.

We need to do many other things. We can put waste things in the dustbin and do not throw them on the ground, there will be less pollution.

Rules are not enough. Every person must help to fight pollution.

1.Hundreds of years ago, life was much harder than it is today because ______.

A.there were not any modern machines

B.there was no modern medicine

C.both A and B

D.there were not many people

2.What is the biggest problem in today’s life?

A.Water pollution

B.Air pollution

C.Noise

D.Pollution

3.The most serious kind of pollution is ______.

A.noise pollution

B.air pollution

C.water pollution

D.A, B and C

4.Factories must clean their water ______.

A.before they are thrown away

B.when they are thrown away

C.after it is thrown away

D.before it is thrown away

5.From the passage we know that ______.

A.a few years ago, there was no smog at all

B.today people don’t have to talk to each other in a loud voice

C.we can drink water from the polluted rivers and lakes

D.people are making rules in order to fight pollution

 

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The world itself is becoming much smaller by using modern traffic and modern communication means. Life today is much easier than it was hundreds of years ago; but it has brought new problems. One of the biggest is pollution. To pollute mean to make things dirty. Pollution comes in many ways. We see it, smell it, drink it and even hear it.

Man has been polluting the earth. The more people, the more pollution. Many years ago, the problem was not so serious because there were not so many people. When the land was used up or the river was dirty in a place, men moved to another place. But this is no longer true. 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, but it is not only one kind of pollution. Water pollution kills our fish and pollutes our drinking water. Noise pollution makes us become angry more easily.

Many countries are making rules to fight pollution. They stop the people from burning coal in houses and factories in the city, and from blowing dirty smoke into the air.

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.

The earth is our home. We must take care of it. That means keeping the land, water and air clean. And we must keep careful of the rise in pollution at the same time.

1.Our world is becoming much smaller ___________.

A.because the earth is being polluted day and night.

B.thanks to science developing.

C.because of the rise in pollution

D.because the earth is blown away by the wind every year.

2.Pollution comes in many ways. We can even hear it. Here “it” means ___________.

A.water pollution

B.air pollution

C.noise pollution

D.rubbish

3. Air pollution is the most serious kind of pollution because __________.

A.it’s bad to all living things in the world.

B.it makes us become angry more easily.

C.it has made our rivers and lakes dirty.

D.it makes much noise.

4.Which of the following is not true?

A.The problem of pollution is not so serious because there are not so many people.

B.From now on, maybe people try to go to work by bus or bike instead of car or motorbike. It is helpful to fight against the pollution of SO2.

C.The pollution of the earth grows as fast as the world’s pollution does.

D.Many countries are making rules to fight pollution.

 

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