完形填空。

　　We live in the “computer age(时代)”．People like scientists, teachers, writers(作家)and even students are using computers to do 　　1　　 work．But more than 30 years ago, 　　2　　 couldn't do much．They were very big and expensive (昂贵的)．Very few people were interested 　　3　　 them and knew how to use them．Today computers are smaller and 　　4　　．　　5　　 they can do a lot of work．Many people like to use them．Some people even have them at home．

　　Computers become very important because they can work 　　6　　 than men and make fewer mistakes．Computers can 　　7　　 people do a lot of work．Using computers, we can translate Chinese 　　8　　 English．Writers now use computers to write．Teachers use them to teach and children use them to play games．Computers can also remember(记忆)what you put 　　9　　 them．Computers are very useful and helpful．They are our good friends．Do you want to 　　10　　 a computer?

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完形填空

　　We are lucky to live in a rich country where we have many things．However, most of us usually 　　1　　 some things．

　　Electricity is one thing 　　2　　 we waste most．Lights, TVs, 　　3　　 and other things are often kept on even when no one is using them．We should turn them off when we do not need them．It 　　4　　 less than a second to do it．Anyhow, not wasting electricity save money, because we do not have to 　　5　　 the electricity we do not use．

　　The second thing that we often waste is water．Fresh water is precious, 　　6　　 it shouldn’t be wasted．It is only a simple matter of turning off a tap．I am sure 　　7　　 can do this easily if he wants to．

　　　　8　　 big waste is food．My mother 　　9　　 cook so much food that much of it was thrown away．I told her we had wasted so much 　　10　　．She thought I was right and now cooks 　　11　　 what we can eat．

　　It is not 　　12　　 to be wasteful．I find there is a simple 　　13　　 of not wasting things．That is to use only what we 　　14　　．Do not touch what we do not need．　　15　　 this way we can stop being wasteful．

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阅读理解

　　Everybody hates rats．But in the earthquake places of the world-Japan, Los Angeles, Turkey-rats will soon be man's new best friends．

　　What happens after an earthquake? We send in rescue(救援)dogs．Why? Because they can smell people．Dogs save lives．They help rescuers to find living people．But dogs are big and they can't get into small spaces．So now a new research project is using a smaller animal to save lives：the rat．

　　How does it work? First, the rat is trained to smell people．When this happens, the rat's brain gives a signal．This is sent to a small radio on its back, and then the rescuers follow the radio signals．When the rat's brain activity jumps, the rescuers know that someone is alive．The rat has smelled that person．

　　Although there are already robots which can do this job, rats are better．Christian Linster at Cornell University, New York, says, “ ‘Robot’ noses don't work well when there are other smells around．Rats are good at that．” Rats can also see in the dark．They are cheaper and quicker to train than dogs, and unlike robots, they don't need electricity．

　　The “ rat project” is not finished, but Julie Ryan of International Rescue Corps in Scotland says, “ It would be fantastic．A rat would get into spaces we couldn't get to and a rat would get out if it wasn't safe．” Perhaps for the first time in history, people will be happy to see a rat in a building(but only after an earthquake, of course．)

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阅读理解：

　　Have you ever stayed in a hotel? Most Chinese hotel often provide guests with things like disposable(一次性的)toothbrushes, toothpaste, shampoo and slippers．Many guests like the idea because they don't have to bring their own．But ,if you travel to Beijing, remember to bring your own things．Starting from June, some hotels in Beijing will no longer provide guests with these disposables．They want to ask people to use fewer disposable things．

　　Many disposable things are made of plastic．People throw them away after only using them once．It is a waste of natural resources(资源)and is very bad for the environment．Do you know that one Chinese person makes as much as as 400kg of waste a year? Most of that waste comes from disposable things．In Beijing, people throw away about 19,000 tons of plastic bags and 1,320 tons of plastic lunch bowls every year! Plastic can take between 100 and 400 years to bread down．So wherever you travel, bring your own things and use them again and again．

　　Back at home and school, you can also do something to make our world a better place．Try to do these things in your daily life：use cloth shopping bags, not plastic ones．After using a plastic bag, wash it out and let it dry．Then you can use it over and over again．Do not use paper cups．At your school canteen(食堂)．use your own bowl and chopsticks instead of(代替)disposable ones．

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