阅读短文，从方框中选择适当的动词，并用其适当形式填空。 有的需要加助动词或不定式符号。
（每词限用一次）
| watch, spend, do, fat, health, |
Now more and more students are becoming too fat and nearsighted (近视), because they (1) ___________
too much time in front of TV. And they hardly ever exercise.
Doctors say that the more students watch TV, the (2) ___________ they become. Because while they
(3) ___________ TV, they often eat some food, and they don't move. On the other hand, their eyes can't
get a rest. It's bad for their eyes, too.
To keep (4) ___________, children should exercise, talk with friends and parents, or go out for a walk,
and don't always watch TV. It's very easy (5) ___________ like that. Let's have a try.