题目内容

 The earth moves round the sun, and the moon moves round the earth. When our part (部分) of the earth turns to the sun, it is day. When our part of the earth turns away from the sun, it is night.

  The sun is much bigger than the moon. But sometimes the moon looks bigger than the sun, because it's much nearer to the earth.

  The sun is very bright. It gives a very strong light. The moon looks quite bright, too. But it doesn't give any light at all.

  The moon looks much bigger and brighter than the stars. But in fact the stars are much bigger and brighter than the moon. They look smaller than the moon because they're much farther away from us.

 46. ________ moves round __________.

    A. The earth, the moon      B. The moon, the earth

    C. The moon, the stars      D. The sun, the earth

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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 problems 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 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 SO2is now the most dangerous kind of air pollution.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.

(1)

________, our world is becoming much smaller.

[  ]

A.

Became of the rise in pollution

B.

Became of the scientific development

C.

Because the earth is being polluted day and night

D.

Because the earth is blown away by the wind every year

(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 many ways.We can even hear it.Here “it” refers to ________.

[  ]

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 is 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

Many of the world's pollution problems have been caused by the crowding of large groups of people into the cities. Supply for the needs of the people leads to further  1  by industry.

If the rapid increase of world   2  continues at the present rate, there may be much greater

  3  to human beings.

Some scientists  4  of the increase in numbers of people as "population pollution''.

About 2,000 years ago, the world population was about 250 million. It  5 a billion in 1850. By 1930 the population was two billion. It is now six billon.

It is  6 to double by the year 2020. If the population  7  to grow at the same rate, there will be 25 billion people in the  8 a hundred years from now.

Man has been  9  the earth's resources more and more  10  over the past years. Some of them are almost gone.

Now many people believe that man's  11 problem is how to control the  12  of the population.

The material supplies in the world will be far from enough to  13 the human population if the present rate of increase continues.

There is already over-crowding in many cities and  14 in some countries. Many people believe that human survival in the future  15 on the answer to the question.

1.A. progress

B. pollution

C. education

D. production

2.A. agriculture

B. industry

C. environment

D. population

3.A. danger

B. harm

C. benefit

D. hardship

4.A. dream

B. approve

C. rid

D. speak

5.A. got

B. took

C. brought

D. reached

6.A. suggested

B. hoped

C. expected

D. said

7.A. continues

B. fails

C. tries

D. means

8.A. world

B. country

C. star

D. end

9.A. discovering

B. using

C. digging

D. destroying

10.A. seriously

B. dangerously

C. rapidly

D. steadily

11.A. greatest

B. easiest

C. lightest

D. simplest

12.A. existence

B. start

C. growth

D. birth

13.A. increase

B. starve

C. construct

D. support

14.A. discussion

B. starvation

C. construction

D. argument

15.A. depends

B. agrees

C. saves

D. passes

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