大学英语四级模拟试题及答案

大学英语四级模拟试题及答案

大学英语四级模拟试题及答案

在现实的学习、工作中，我们最熟悉的就是试题了，借助试题可以更好地对被考核者的知识才能进行考察测验。什么样的试题才能有效帮助到我们呢？下面是店铺收集整理的大学英语四级模拟试题及答案，仅供参考，大家一起来看看吧。

大学英语四级模拟试题及答案 篇1

Part Ⅱ Reading Comprehension (35 minutes)

Directions: There are 4 passages in this part.Each passage is

followed by so

me questions or unfinished statements.For each of them

there are four choices marked A),B),C) and D).You should decide

on the best choice and mark the corresponding

letter on the Answer Sheet with a single line through the

center.

Questions 21 to 25 are based on the following passage:

Some radio singals were heard in 1967.They were coming

from a point in the sky where there was unknown star.They were

coming very regularly,too:about once a seco

nd,if they were controlled by clock.?

The scientists who heard the signals did not tell anybody

else.They were rather afraid to tell in case they frightened

people.The signals were coming from a very small body—no

bigger,perhaps than the earth.Was that why no light could be

seen from it?Or were the signals coming from a planet that

belonged to some other star??There was no end to the

questions,but the scientists kept the news secret.“Perhaps there

are intelligent beings out there.”they thought,“who are trying

to send messages to other planets,or to us?So the news was not given to the newspaper.Instead,the scientists studied the signals

and searched for others like them...Well,all that happened in 1967

and 1968.Since then scientists have learnt more about those

strange,regular,radio signals.And they have told the story,of

course.

The signals do not come from a planet;they come from a new

kind of star called a “pulsar””.About a hundred other pulsars

have now been found,and most of them

are very like the first one.?

Pulsars are strong radio stars.They are the smallest but the

heaviest stars we know at present.A handful of pulsar would

weigh a few thousand tons.Their light—if they give much light—is too small for us to see.But we can be sure of this,no intelligent

beings are living on them.

21. The radio signals discussed in this passage____.

A.were regular B.were controlled by a clock

C.were heard in 1967 only D.were secret messages

22. The radio singals were sent by____.

A.a satelliteB.a planet

C.a sky body which was unknown at that time

D.intelligent beings who were unknown at that time

23. The scientists did not tell people about the signals

because____.

A.the singals stood for secret messages

B.people would ask them too many questions

C.they did not want to frighten people

D.they stood for unimportant messages

24. A pulsar is____.

A. a small heavy star which sends out strong radio signals

and cannot be seen B. a small heavy planet which sends out strong radio signals

and cannot be seen

C. a small heavy satellite which sends out strong radio signals

and cannot be seen

D. a small intelligent being who sends out strong radio

signals and cannot be seen 25. Which of the following is true?

A.One of the pulsars found by scientists sends radio signals.

B.Pulsar began to send radio singals in 1967.

C.Scientists have searched for pulsars for many years but

found none.

D.Scientists have found many pulsars since 1967.

Questions 26 to 30 are based on the following passage:

Over vast areas of every continent,the rainfall and vegetation

necessary for life are disappearing.Already more than 40 percent

of the earth's land is desert or

desert?like.About 628 million people—one out of seven—live in these dry regions.In the past,they have managed to

survive,but with difficulty.[ZZ(Z]Now largely through problems

caused by modern life,their existence is threatened by the

slow,steady spread of the earth's deserts.

Scientists still do not understand all the complex problems

of the desert,but there have been many ideas for saving the

land.Sandi Arabia has planted 10 million

trees to help keep the sand from taking over fertile areas.The

Israelis are aga

in using some of the water collection systems left by the

ancient people in the

Negev desert.They plan to water their orchards with the extra

water.Some Sahel farmers still raise cattle on their poor farm

land,but before the cattle are sold, they are taken to greener lands in the south to get fat.

26. What is the article mainly concerned?

A.The problem of spreading desert.

B.The rainfall and vegetation in desert areas.

C.The water collection systems.

D.The difference between modern life and ancient life.

27. “one out of seven” refers to____.

A.more than a third of the lands' earth

B.the percentage of the earth's land that is desert-like

C.the number of people who live in dry regions

D.a day of a week

28. In paragraph 2,“they are taken to the greener lands in

the south.”They

refers to____.

A.the Sahel farm land B.the farmers

C.the cattles D.the trees

29. How many ideas for saving the land are described?