题目内容：

Most children like watching TV. It's very interesting. By watching TV they can see and learn a lot and know many things about their country and the world. Of course ,they can also learn over the radio. But they can learn better and more easily on TV. Why? Because they can hear and watch at the same time. But they can't see anything over the radio. TV helps to open children's eyes. It helps to open their minds , too. They learn newer and better ways of doing things. Many children watch TV only on Saturday or Sunday evening. They are always busy with their lessons. But a few children watch TV every night. They go to bed very late. They can' t have a good rest. How about you, my young friend?

1.A few children go to bed late because they ______

A．are busy with their lessons	B．do their homework
C．watch TV	D．listen to the radio

2.Children can't see anything ______

A．in the radio

B．on the radio

C．on TV

D．by watching TV

3.TV helps to open children's ______

A．eyes and minds

B．minds

C．eyes or minds

D．eyes

4.Why do many children watch TV only on Saturday or Sunday evening? Because ______

A．TV is not good	B．they don't like watching TV
C．they have no time	D．they want to play football

5.Children can study better and more easily on TV because ______

A．they like to watch TV

B．they can hear at the same time

C．they can watch at the same time

D．they can hear and watch at the same time