取经过编号的5支试管分别加入2mL物质的量浓度为0.5mol/L的过氧化氢溶液，进行如下实验，根据实验内容，下列说法正确的是（　　）

    Andy is 12 years old. He is one of my best f____. He is a top student in Class 6. But he doesn't have a good diet.

    Every morning, he doesn't eat breakfast. It isn't right. I think breakfast is very i____ for him. It helps him start the day w____. He has lots of snacks like chocolates, sweets every day. They make him fat. It's bad for his health. Andy shouldn't eat too many snacks any more. In vegetables and fruits there are many vitamins. But he h____ eating them. These days he doesn't feel good.

    I think he needs to c____ his diet. And he needs to exercise more. I'm sure he'll be better.