完形填空。 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. (     )1. A. turn on (     )2. A. and (     )3. A. more better (     )4. A. or (     )5. A. calling (     )6. A. without (     )7. A. to show (     )8. A. bank (     )9. A. in (     )10. A. someday B. turn off B. but too B. much worse B. but B. calls B. with B. showing B. hospital B. on B. every day C. turn down C. but also C. very good C. while C. called C. for C. to be shown C. park C. by C. one day D. turn up D. so D. much better D. and D. are called D. into D. shown D. library D. without D. everyday