通读下面短文，掌握其大意，然后从所给的A、B、C三个选项中选出一个最佳答案。

Most children like to watch TV. It's very interesting1us. On TV they can see and learn a lot and know many things2their country and the world.3they can learn over the radio, but they can learn4with the TV. Because they can hear and watch at the same time. But they can't5anything over the radio.

Many children watch TV only on weekends. They are always6with their lessons on weekdays. But some children watch TV every7. They go to bed very late. They can't have a good8. This is not good9their health. And sometimes they go to bed so late that they10get up on time.