On October 12,1989,some British scientists were working at the computers to look for the information they needed.Suddenly they saw a lot of very bright points crossing the computersscreens.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(恐怖),they found out that most of their stored information was got rid of by computer viruses(病毒)!Clearly 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 men fond of playing tricks.①They all had excellent education.They created the viruses just to show their intelligence(才能).These kinds of computer viruses are named Jerusalem Viruses.These viruses can stay in computers for a long time.When the time comes they will attack(袭击)the computers by lowering the functions(功能),damaging their normal programs or even getting rid of all the information.②
We now come to know that Jerusalem Viruses often attack computers on Friday and that they are spreading(传播)to a lot of computers.Among the countries that were attacked by computer viruses last year are Britain,Australia,Switzerland and the U.S.But till now,how to get rid of the terrible viruses remains a problem.
1.When the viruses attack the computers,the computers will work____.
2.The group of young men created the viruses to ____.
A.damage the computers
B.test their ability
C.tell people that they were intelligent
D.play a trick on users of the computers
3.According to the passage,computer viruses seem to ____.
A.have been in nature for years
B.stay in any computers
C.be difficult to get rid of at present
D.be able to be got rid of in the near future
4.According to the passage,which of the following is TRUE?
A.Last year four countries found their computer were infected by viruses.
B.The viruses will come to a new computer after staying in the old one for some time.
C.Scientists are trying to find a way to get rid of the viruses.
D.The Jerusalem Viruses are dangerous to human health.
①It is said that the computer viruses were made by a group of young men fond of playing tricks.据说计算机病毒是由一群喜欢搞恶作剧的年轻人制造出来的。
②When the time comes they will attack the computers by lowering the functions,damaging their normal programs or even getting rid of all the information.当时机到来时，它们就会通过减弱计算机的功能、破坏它们的程序甚至删除所有的信息来攻击计算机。
Mr Jackson lived in the centre of London but he had a hotel near the airport.There a lot of foreigners stayed for night.He didn't know any other language but English and he found it difficult for him to understand the foreign visitors.①Sometimes he had to use the body language to“talk”with them,and tried his best to make himself understood.But he was often misunderstood(误解)and it brought him a lot of trouble.A friend of his who learned a few foreign languages in a university would teach him.He was happy and studied hard.At first he learned some,but soon he found it wasn't easy to remember the words and expressions.His friend advised him to write down the useful expressions in his notebook so that he could use them when necessary.②He did as he was told.He found it helpful for him to do so.
One evening there were plenty of people in the diningroom.They were all busy eating something except a Japanese.He was walking around there and waiting for his wife who was dressing herself up upstairs.Mr Jackson thought to himself,“The man wants to eat something but he doesnt know any English.Let me help him.”
As he knew only a little Japanese,he had to bring out his notebook and showed it to the man,pointing to the sentence“Im hungry”.
The Japanese had a look at it and gave him two pounds and left.
1.Mr Jackson knew only English because____.
A.he was an English student
B.he had never been abroad
C.he couldn't learn by himself
D.he hadn't studied any foreign languages
2.As not all foreigners understood his gestures,sometimes Mr Jackson ____ to communicate with them.
3.The Japanese thought ____,so he gave him two pounds.
A.Mr Jackson was a beggar(乞丐)
B.Mr Jackson was a translator
C.Mr Jackson could help him
D.Mr Jackson could ring his wife up
①He didn't know any other language but English and he found it difficult for him to understand the foreign visitors.
②His friend advised him to write down the useful expressions in his notebook so that he could use them when necessary.
Comera is the only place in the world which has a whistle(口哨)language.①We do not know how and why it began because we do not know the complete history of the island.But we can certainly imagine the reasons for the beginning of the whistle language.There are many deep valleys(峡谷)on the island.A person on one side of a valley can not easily shout to a person on the other side.But he can whistle and be heard.Some of the best whistlers can be heard from four miles away and the record is seven miles.The people who live on the island usually have good teeth,and this helps them to whistle well.They must also have good ears so that they can hear other whistlers.
We can understand why the whistle language continues.It is very useful on the island,and quite easy to learn.When somebody is hurt or ill,the whistle language takes the place of telephone.If the sick person is quite far away from the town,people pass the message from one to another.A boy guarding cattle(放牛)on a hillside whistles to a man fishing from his boat.The last one is able to describe the trouble fully and exactly to the doctor in town.People help one another in the same way when a car breaks or a cow is lost.
The whistle language is hundreds of years old,and probably it will continue to live on for hundreds of years more.Radio and TV often kill the special ways of speaking in the different parts of a country.②But on Comera you are nobody if you cannot whistle.Perhaps soon after TV arrives on the island,the people there will be whistling the news and other facts and opinions.
1.If a person on Comera island is ill,____.
A.others will phone the doctors in town
B.the whistle language will help pass the message to the doctor
C.his family will take him to the hospital
D.people will take him to town by carriage
2.From this passage we know radio and TV ____ at that time.
A.killed the special way of speaking
B.whistled all the news and opinions
C.helped Comera people to communicate
D.did not appear on Comera island yet
3.Comera island is special in that____.
A.many visitors go there every year
B.no visitors have ever been there
C.people there have special ears to hear whistles
D.people there use the whistle language to communicate with each other
4.Which of the following is NOT true according to the passage?
A.It is not easy for a person to live on Comera island if he cannot whistle.
B.The whistle language can only be found in Comera.
C.The whistle language has been used for hundreds of years on the island,but will not be used any longer.
D.The record shows that one best whistler can be heard by others seven miles away.
①Comera is the only place in the world which has a whistle language.
②Radio and TV often kill the special ways of speaking in the different parts of a country.