Radio, telephone and television are widely used in the world．When you 1 the radio, you can listen．But when you use telephone, not only can you listen to others 2 you can chat with them, however, you can’t see the other one at all．Television is 3 than both of them．People can watch TV and listen to it, 4 you can’t take part in what you see．
Today, some people are using a type of telephone 5 vision-phone．Two persons who are talking can see each other 6 it．
Vision-phones can be of great use when you have something 7 the person whom you are calling．It may also have other uses in the future．Some day you may be able to call up a 8 and ask to read a book right over your vision-phone．You may be able to do the shopping through it, too．Perhaps 9 the near future, vision-phone will come into wider uses in our 10 life．
