47. The correct order of the following events is       .

a. The girl wore her hair in a ponytail.

b. The girl parted her hair down the middle.

c. The girl braided her hair.

d. The girl didn’t need to think about her hair.

A. a b c d           B. a c b d       C. c b a d      D. d c b a

48.  Why was the girl always happy?

A. Because everyone thought she was beautiful.

B. Because everyone liked her thick and long hair.

C. Because she always looked on the bright side of things.

D. Because she didn’t like any hair on her head at all.

(B)

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 means 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 CO2 is now the most dangerous problem of air pollution. It is caused by heavy traffic. It is sure that if there are few 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.

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

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

50. 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

51.  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, people should try to go to work by bus or bike instead of car or motorbike.

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

D. Many countries are making rules to fight pollution.