The first black-and-white nine-by-twelve inch TV sets
In a surprisingly short time
1. has been replaced by colour television.
2. the development of TV became digital television in which the usual signal is replaced by a digital code.
3. At present 3. were of historical importance
4. Satellite and cable TV makes 4. television has had great influ- it possible ence on people's life and way of
5. Recently black-and-white TV 5. is the most important stage in
the development of TV since the appearance of colour television.
6. The next major advance in 6. to watch TV programs in dif-
ferent parts of the country and throughout the world.
7. The invention of high-defini- 7. there are different kinds of tele- tion television with a picture re- vision systems: satellite, cable, col- sembling a wide screen film our, pocket-size, digital, high-de finition television.