题目内容：

用方框中所给单词的适当形式填空，使对话通顺、正确。每词仅用一次（每空一词）

Now more and more children are   1.  very heavy. Maybe there are two main   2.  .

Firstly, there are too many shops around schools. The shops sell unhealthy food, such as fried chicken and ice cream at low prices. So some children don’t like to eat at home. If there were fewer of these shops, then probably children would buy 3.  junk food.

Secondly, children have bad 4. habits. They like fast food. Today we can see McDonald’s and KFC everywhere. Many children are crazy about fast food. In fact,   5. of the fast food is unhealthy because it has too much salt and sugar.