阅读理解

　　Television is good．You'd like to watch it all day and all night．But don't! Too much TV is a very bad thing, especially for kids．

　　Scientists(科学家)found that kids who watch too much TV may have more trouble learning to read than other kids．They can't focus(集中)on their work．

　　Kids learn language skills best by reading, talking and playing with others．If they spend too much time watching TV, they'll have less time for those things．It may make it harder for them to get on with others when they grow up．

　　Watching too much TV is bad for people's health．People don't move much while watching TV．What's more, they may eat a lot of food while watching．This can make them fat．We call these people“couch potatoes(沙发土豆)”．Do you want to be like them?

　　Fighting(打仗)on TV is a big problem for kids．An American child will watch 12,000 fighting acts(画面)on TV a year．Young people are good at following．Scientists have found that those who watch a lot of fighting shows are more likely to fight．

　　Experts(专家)say：watching TV for two hours a day at most!

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阅读理解

　　People have always wanted to speak with animals．There are many books about this, especially children books．Now there are also movies, such as Dr．Doolittle．When you watch animals, it seems clear that they can communicate with each other．Many people wonder why people can’t also communicate with them．

　　Scientists know how some animals communicate．Bees, for example, use their bodies．They do a kind of dance to give information about food．Birds, on the other hand, share information with sounds．They use certain sounds to protect their homes and to stay together when they fly．Some male(雄性)birds use lovely songs to attract a female(雌性)．Other animals communicate with both body movements and sounds．For example, dogs wag(摇摆)their tails(尾巴)when they are happy, and they bark(吠)when they are excited．

　　People used to think it was possible to teach human language to animals．Parrots and other birds, for example, can learn to say words．But the birds just repeat the words．They don’t understand them．Some American scientists tried to teach English to chimpanzees, close relatives of human beings．However, this was impossible．Chimpanzees can’t move their mouths the right way．They could never learn to speak like people．

　　Then scientists tried to teach human language to chimpanzees in other ways．Some tried with American Sign Language(ASL)．Others tried with a simple computer．But chimpanzees could only learn to use a few words．They could never learn to use grammar．Their brains are very different from the brains of human beings．

　　Now some scientists are studying the same points between human and animal language．In fact, some animals use sounds like people do．Dogs, for example, use an unpleasant, low sound to tell other dogs to stay away．People, too, use that kind of voice to say the same things．A dog’s noisy bark communicates that something is happening．People use the same high tone when they shout,“Watch out!”

　　Scientists want to understand the language of other animals, such as whales and bears．To do this, they go out to the animals’ natural homes．They watch the animals for days or even years．They take pictures and make tapes recordings and share the information with other scientists．In this way, they hope to learn more about the way animals communicate, and maybe someday we’ll be able to communicate better with them．

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