请阅读全文，并从下列方框里的六个句子中选择五句还原到短文里，使原文的意思完整、连贯。
Falling asleep can be very common (普遍的) for some students. It is bad for students because they can't learn anything if they fall asleep in class. Here is some useful advice.
Eat a great breakfast in the morning.
A healthy meal can give you enough energy and help you get ready for the day.
Work early and sleep early.
Do your homework earlier when you get home. Make sure you get as many hours of sleep as your body needs.
Make sure to follow the teacher and write down the important points on your notebooks. If you just sit there and do nothing, you will get tired and fall asleep easily.
Exercise as much as you can.
If you do exercise more often, you will be more energetic (有活力的) and won't fall asleep easily in class.
Follow the advice, and you may not feel sleepy in class anymore. Let's get started!
A．Stay focused (专注的) in class.
B．So how to break (戒除) this bad habit?
C．Milk, bread and eggs are good choices (选择) for you.
D．If you don't eat dinner, you probably won't sleep well.
E．As we all know, doing exercise is a good way to keep healthy.
F．In this way, you can go to bed early and get ready for tomorrow.
Humans have kept animals for thousands of years. Today, kids still like to go to the zoo. But do you think it's right to keep animals in the zoo? Come and tell us how you think!
