Most students like junk food（垃圾食品） because it is tasty． Whether it should be allowed in schools or not is still a question． Just as every coin has two sides， junk food in schools has its advantages and disadvantages．

Most junk food is quite cheap， tasty and easy to get． If a child forgets to carry a lunch bag， he or she will go hungry for most of the day． Here， junk food helps him or her to have something to eat． Moreover， it is possible for students to save a lot of

Sometimes having junk food instead of part of one's main diet is considered to be OK． It doesn't have a big influence on a person's health if someone only eats from time to time．

Compared with some junk food with high oil and salt， food like potato chips or juices can be made in school dining halls． So students don't have to choose unhealthy food from outside．

However， too much oil， salt and sugar in junk food are harmful to human bodies． Some of them cannot be broken down in the body． If someone eats too much junk food， it can lead to obesity（肥胖） and other health problems like heart trouble， high blood pressure and so on．

Usually， children have snacks between classes． There is a sudden increase of sugar， so they get a lot of energy and become too active． But when classes begin， the effects（作用） of the snacks begin to reduce， they become slow． This causes low energy levels and lack of concentration（注意力）． It has a bad influence on a student's performance during classes．

In all， it is important that parents and schools should provide their kids with healthy and balanced food and make them know the disadvantages of junk food．Then they will make healthier choices for themselves．

Topic		Junk food in （51）
（52）		Junk food is popular among students， but like everything else， it has both advantages and disadvantages．
Main body	Advantages	Junk food is quite cheap and （53）　　 good．
		It helps to stop students' hunger．
		It is （54）　　for students to save time by eating junk food．
		Eating junk food （55）　　won't influence a person's health．
		Food like potato chips or juices made in school dining halls can help students to （56）　　unhealthy food from outside．
	Disadvantages	Too much oil， salt and sugar in junk food are （57）　　to human bodies．
		If someone eats too much junk food， it can （58）　　heart trouble and other health problems．
		Eating junk food can have a （59）　　influence on a student's performance during classes．
Conclusion		Parents and schools should educate children and provide healthy food （60）　　 _____them．