假如你是王飞，今天你收到了好友李磊的一封信。信中说他想买一部手机，为此他想征求一下你的意见。请你根据以下提示，给李磊写一封回信，建议他不要买手机。
1．校内不允许使用手机，因为会打扰别人； 2．发短信会占据太多的学习时间；
3．经常会收到一些不良短信； 4．手机费用会增加父母的经济负担。
注意：1．回信须包括以上全部要点，但不得逐句翻译；2．要符合书信的格式要求；
3．词数：100左右。
参考词汇：短信 the short message；打扰disturb
Dear Li Lei：
I’m very glad to receive your letter today. How are you getting along with your study?
In your letter，you asked me whether you should buy a cell phone or not. In my opinion，it is unnecessary for a student. Why？First，sending or receiving short messages takes up too much time. Therefore，the time that you should spend on studies becomes shorter. Second，it is forbidden to use cell phones at school because sometimes you have to answer the call in class. As a result，your behavior may disturb others. Third，you may be disturbed by some unhealthy short messages. Finally，as a student，you have to ask your parents for the phone expenses，and they will have to spend more in supporting you than before.
In short，I suggest that you think it twice. Best wishes.
Yours sincerely，
Wang Fei
题目分析：本题要求考生根据所给要点提示要英语写一篇100词左右的作文。首先，这是“你”给李磊的回信，故要使用第一人称，同时注意书信格式。其次，回信劝告李磊不买手机及其理由，所以使用动词的一般现在时。第三，题目提示较为具体，考生完成任务难度不大。但是不可逐句翻译。不能遗漏要点。
【亮点说明】
本文使用了比较高级的词汇、结构和较为复杂的句式。如“动名词”作主语、定语从句、think twice等。句式多样，有简单句、并列句，有复合句。条例清楚，层次分明。