阅读下面材料，在空白处填入一个适当的内容（1个单词），或括号内单词的正确形式。

    As we all know, it is very important to keep healthy. But do you know to keep healthy. Firstly, I think we must have enough food to keep (we) energy for breakfast. We must also have the right kind of food. Remember to eat  (many) fresh fruit and vegetables but less junk food. Don't forget to wash your hands meals. Secondly, it's necessary for us  (take) exercise. Exercise will keep us active and strong.   (third), I think staying up is bad for our health.  we can't get enough sleep, we may have a headache. We should go to bed early get up early. Lastly, (listen) to music or chatting can also make us (feel) relaxed.