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　　Radio, telephone and television are widely used 　　1　　 the world．When you 　　2　　 the radio, you can listen．But when you use a telephone, you can not only 　　3　　 others but also talk with them, however, you can’t see 　　4　　 at all．Television is much 　　5　　 than either of them．People can watch TV and listen to it．

　　Today some 　　6　　 are using a new type of telephone called visionphone(可视电话)．With it two people who are talking can see 　　7　　．

　　Visionphone can be very 　　8　　 when you have something to show the person whom you are calling．It may also have other uses in the future．Someday you may be to call up a library and ask to 　　9　　 a book right over your visionphone．You may be able to 　　10　　 through it．

　　Suppose(假设)you read about something 　　11　　 the newspaper that you want to buy, you will go to your visionphone and 　　12　　 the shop．The shop assistant will 　　13　　 you the thing that you’re interested in．You’ll 　　14　　 leave your home．

　　Perhaps in the near future, visionphone will come into wide use in our 　　15　　 life．