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．
【小题1】Hundreds of years ago．life was much harder than it is today because        ．

Skin-diving(潜泳) is a new sport today. This sport take you into a wonderful new world. It is like a visit to the moon! When you are under water, it is easy for you to climb big rocks, because you are on longer heavy.

Here, under water, everything is blue and green. During the day, there is plenty of light. When fish swims nearby, you can catch them with your hands.

When you have tanks(罐) of air on your back, you can stay in deep water for a long time. But you must be careful when you dive in deep water.

To catch fish is one of the most interesting parts of this sport. Besides, there are more uses for Skin-diving. You can clean ships without taking them out of the water. You can get many things from the deep sea.

Now you can see that Skin-diving is both useful and interesting.

1. Skin-diving can take you to _________.

A. an exciting world                B. a new world

C. a beautiful world                D. an interesting and new world

2. This sport _________.

A. is like to travel on the moon        B. is like to play in water

C. is like to visit a new country        D. is like to climb a big rock

3.You can stay in deep water for a long time because __________.

A. you can swim                      B. you can take tanks of air with you

C. you can bring something to eat    D. you can skin diving

4.Which of the following statements is NOT true ?

A. Skin-diving is a new sport.

B. Skin-diving is like visiting the moon

C. The only use of skin-diving is to have more fun.

D. Skin-diving is not only interesting but useful.

5. Skin-diving is a useful and interesting sport because __________.

A. you can catch fish with your hands

B. you can clean the ship in the water

C. you can get many things from the deep sea

D. all of the above

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

   Man has been polluting the earth. The more people, the more pollution. Many years ago, the problems was not so serious because there were not so many people. When the land was used up or the river was dirty in one place, man 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 for all living things in the world, but it is not the only one kind of pollution. Water pollution kills our fish and pollutes our drinking water. Noise pollution makes us angry more easily.

   Many countries are making rules to fight pollution. They stop people from burning coal in houses and factories in the city, and from putting dirty smoke into the air. Pollution by SO2 is now the most dangerous kind of air pollutions. It is caused by heavy traffic. We are 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 take care of the rise in pollution at the same time.

选择合适的选项填空：

1.________, our world is becoming much smaller.

A. Because of the rise in pollution.

B. Thanks to the development of traffic and communication

C. Because the earth is blown away by the wind every year.

D. Because the earth is being polluted day and night.

2.Hundreds of years ago, life was ________ it is today.

A. much easier than    B. as easy as    C. much harder than    D. as hard as

3.Pollution comes in may ways. We can even hear it. Here “it” means _________.

A. rubbish    B. noise pollution    C. air pollution    D. water pollution

4.Air pollution is the most serious kind of pollution because _________.

A. it makes much noise

B. it makes us angry more easily

C. it makes our rivers and lakes dirty

D. it’s bad for all living things in the world.

5.Which of the following in NOT true?

A. Many countries are making rules to fight pollution.

B. The pollution of the earth grows as fast as the world population does.

C. The problem of pollution is not so serious because there are not so many people living on the earth.

D. If people could go to work by bus or bike instead of car or motorbike, it would be helpful in fighting against the problem of SO2.