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We know that most children love junk food very much, although it's bad for their health and their parents don't want them to eat too much junk food. Most children know it's not a good habit, but they still want to eat it. Some of them eat this kind of food every day. Some only eat it twice or three times a week.

I know a boy called Bill. He isn't healthy. He hardly ever exercises. And he eats lots of junk food because he loves it. When he has pocket money(零用钱), he always buy junk food. His parents worry about him a lot, but he says, "Maybe I'm not very healthy, but I enjoy myself." His parents have no good ways to stop him.