1children like to watch TV. It' s very 2. On TV3can see and learn a lot and know many things 4 their country and the world.5they can learn over the radio. But they can learn better and more easily on6.Why? Because they can hear and watch at the same time. But they can' t 7 anything over the radio.

    Many children watch TV only on Saturday or Sunday evening.They are 8 busy with their lessons. But a few children watch TV every 9. They go to bed very late. They can' t have a good10. How about you, my young friend?

762－18×(125÷5)=____

中国人实现奥运史上零的突破是在（    ）

要建造一座房子，四面的窗户都对着北方，你认为应该建在（    ）