信500字

　　Dear Editor,

　　I'm a senior 2 student. Now MP3 and MP4 are very popular among us middle school students. there are many advantages about it . Firstly, It's so small that it os convenient for us to carry.Seconedly,it can help to improve our English listening . Thirdly,it can be ised to download musiac ,songs and even films,whoch can thus enrich our life.

　　However,there are some disadvantage,too.Scientific researches doscover that overusing it can influence our hearing, which is harmful to our health. Besides, some students are addicted to pop songs and music,both in and out of class and other students even listen to it on the way,which is tjought very dangerous.

　　In my opinion,we should make good use of MP3 and MP4 in our study and on the other hand,we should learn to use them properly and sagely.

　　Yours ,

　　LiHua

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