问题：
答案：
In my opinion, watching TV has both its advantages and disadvantages. The key point depends on how young people control themselves. Firstly, I think TV is a convenient and efficient medium for obtaining knowledge and information. Besides, TV viewing is a cheap means of entertainment. Even if you haven’t enough money, turn on the TV and you can travel around the world or watch films, plays, operas without buying a ticket. But every coin has two sides. Watching TV can be addictive. To spare too much time before the screen is not good for young people’s health and their social communication. Furthermore, too much violence in the programs will inevitably have bad effects on them. So I think young people should make good use of TV and determine what is worth watching and what is simply trash. They should watch those interesting and instructive TV programs.