Dear Headmaster,

I’m writing to persuade you to let us surf the Internet in the classroom. We know you’re afraid that we may be exposed to unhealthy websites or spend too much time playing games online. Personally, I think surfing the Internet can bring us much more advantages.

First of all, we can surf the Internet for a wide range of learning resources in a short time without working hard in the library. Furthermore, during the lunchtime, we can communicate with our foreign friends, sharing our experiences, cultures and studies through the Internet. This way, we can improve our language skills by chatting online. Last but not least, as high school students, we are old and wise enough to tell right from wrong. Believe in us and we will learn how to stay away from unhealthy websites. 

I do hope you can take my suggestion into consideration and let us get access to the Internet at school.

Looking forward to your reply. 

Yours,

Li Ming

题目分析：这是一篇应用文写作，写一封信劝说校长同意开通教室内的网络。本题给出的材料较为简略，动笔前应先认真阅读材料，围绕所给材料组织内容，确定主要短语，句式等问题。通过阅读材料可知这篇短文主要使用的人称就是第一二人称，时态为一般现在时态，这方面需要注意的问题比较少。动笔前可以按照材料内容列出简单提纲，写出关键单词。写作中注意语义通顺，符合逻辑关系。上下文之间可以适当使用连接词。

点评：做英语书面表达时，要注意认真审题，分析体裁，确定时态；分析内容要点，列出一些基本词汇及词组；注意表达的条理性，用好连接词。最后，注意不要犯语法、句法以及搭配性错误。