On October 12, 1987, some Chinese scientists were working at the computers to look for information they needed. Suddenly they saw a lot of very bright spots(点 )crossing the computers’ screens. At the same time the computers were working much slower. To find out what was happening they stopped their work to check some parts of the computers. To their horror(恐惧), they found out that most of their stored information was got rid of( 除掉) by computer viruses! Obviously all these computers had been infected（感染 ） by computer viruses.

    It is said that the computer viruses were made by a group of young man fond of playing tricks. They all had excellent education. They created the viruses just to show their intelligence.（才智）These kinds of computer viruses are named Jerusalem( 耶路撒冷 )Viruses. These viruses can stay in computers for a long time. When the time comes they will attack the computers by lowering the function(功能), damaging their normal programs or even getting rid of all the information.

   We now come to know that Jerusalem Viruses often attack computers on Fridays and that they are spreading(传播) to a list of computers. Among the countries that suffering computer viruses are Britain, Australia, Switzerland and the U.S. But till now, how to get rid of the terrible remains a problem.

1.The group of young men created the viruses to __________. 

A. damage the computers

B. test their ability

C. play a trick on operators of the computers

D. tell the world that they were intelligent

2.According to the passage, computer viruses seem to _______.

A. have been in nature for years  

B. be difficult to get rid of at present

C. exist（存在） in any computers

D. be able to be got rid of in the near future

3.The most serious damage caused by the viruses is that _______.

A. all the information stored in the computers is gone

B. the computer’s functions are lowered   

C. the normal programs are damaged

D. the computers infected by the viruses can no longer be used

4.According to the passage, which of the following is true?

A. Four countries found their computers were infected by viruses.

B. The viruses will come to a new computer after staying in the old one for some time

C. The Jerusalem Viruses are a great harm to human health.

D. Scientists are trying to find a way to get rid of the viruses

 

Translate the following sentences into English, using the phrases in brackets

那些草应尽快除掉。(get rid of)

________________________________________________

Translate the following sentences into English, using the phrases in brackets

那些草应尽快除掉。(get rid of)

________________________________________________

阅读理解

　　The earth is our home. We must take care of it. This means keeping the land, air and water clean.

　　Pollution(污染)is a “dirty” word. To pollute means to make things unfit or unclean to use. Pollution comes in many ways; we see it, smell it, taste it and drink it. Pollution it beginning to threaten(威胁)out health, out health, our happiness and our life.

Man has been polluting the earth from the time he first made fire, washed his clothes in the river and threw his waste on the ground. When land was used up or water became dirty, men moved on to another place. At first the problem was not so serious because there was plenty of clean air, land water. There weren’t many people and then their wants were fewer. All the dirty things could be absorbed (吸收)by nature and soon covered over. But this is no longer true. The increase of population and the development of industry have changed that. Man is slowly poisoning his environment(环境).

　　Once we thought of pollution, we simply mean air pollution. Though it is still the most dangerous, air pollution is only type of pollution.

　　Through the use of poison, man has polluted the land, killing the animals. By putting dirty water and chemicals into rivers and lakes we have polluted our drinking water, killing the fish.

　　Our increasing population is part of the problem. More people more waste.

　　Where is this all to end? Are we turning the world into a big rubbish dump(垃圾堆), or is there any hope that we can get rid of (除掉)the pollution.

　　Fortunately millions of people have been warned(警告)of the danger of pollution. Large numbers of people are now working hard to bring pollution under control(控制).

1．We must take care of the earth because ________.

[　　]

A．the earth moves round the sun

B．we live on the earth

C．a lot of animals live on it

D．it is being polluted．

2．To pollute means ________.

[　　]

A．to make clean

B．a “dirty” word

C．to make air, water, soil unfit

D．uncleanness

3．Hundreds of years ago the earth could manage the pollution problem because. ________

[　　]

A．there was no industry then

B．there was plenty of fresh air, land and water

C．waste could be absorbed by nature

D．both B and C

4．Through the uncontrolled use of poison man has ________

[　　]

A．made the drinking water dirty

B．protected the animal life

C．go good harvest

D．polluted the land

5．Now man ________.

[　　]

A．begins to understand the danger of pollution.

B．takes some measures to control pollution

C．still doesn’t realize how serious pollution is

D．doesn’t pay any attention to pollution