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1、B篇The world itself is becoming much smaller by using modem 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
2、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
3、 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
4、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 SO2 is now the most dangerous kind of air pollution. It is caused by heavy traffic. It is sure that if there are f
5、ewer 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 population at the same time.21. Our world is becoming much smaller _.A. because the earth is being polluted day
6、 and night.B. thanks to science developmentC. because of the rise in populationD. because the earth is blown away by the wind every year22. Thousands of years ago, life was _ it is today.A. much easier than B. as easy asC. as hard as D. much harder than23. Pollution comes in many ways. We can even h
7、ear it. Here "it" means _.A. water pollution B. air pollutionC. noise pollution D. rubbish 24. Air pollution is the most serious kind of pollution because _.A. it's bad for all living things in the worldB. it makes much noiseC. it makes our rivers and lakes dirtyD. it makes us angry mo
8、re easily25. 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's population does.C. If people could go to work by bus or bike instead of car or motorbike it would be helpful in fighting against the pr
9、oblem of SO2.D. The problem of pollution is not so serious because there are not so many people living on the earth cMany people are surprised when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer networks (网络) didn't work well. If o
10、ne computer in the network broke down, then the whole network stopped. So a new network system had to be set up. It should be good enough to be used by many different computers. If part of the network was not working, information(信息)could be sent through another part. In this way computer network sy
11、stem would keep on working all the time.At first the Internet was only used by the government (政府), but in the early 1970s, universities , hospitals and banks were allowed (允许) to use it too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990
12、s, computers became cheaper and easier to use. Scientists had also developed software (软件) that made "surfing" (浏览) the Internet more convenient .Today it is easy to get on-line (上网) and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular
13、among students.The Internet has now become one of the most important parts of people's life.1. The Internet has a history of more than _ years.A. sixty B. ten C. thirty D. twenty2. A new network system was set up to _.A. make computers cheaperB. make itself keep on working all the timeC. break d
14、own the whole networkD. make computers large and expensive3. At first the Internet was only used by _.A. the government B. universitiesC. hospitals and banks D. schools4. _ made "surfing" the Internet more conve-nient.A. Computers B. Scientists C. Software D. Information5. Which of the following
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