第一段：称呼
Dear Mr. President,
第二段：引出写信的目的
主题句： This letter comes to you from ____.
扩展句： In it, some opinions are put forward for you to reflect upon.
第三段：对学校食堂正面的看法
主题句：As you know, _____ . But unfortunately, ______.
扩展句：1、___. (举例)As a result, _____.
2、Besides, ______.
3、And what's more,_____.
第四段：对学校食堂负面的看法
主题句：Some people may argue that ____.
扩展句：1、For instance, ____ and ____.
2、But in my opinon, ______.
第五段：结尾，表明自己看法
结尾句：To be belief, though a bit dissatisfied with _____.
扩展句：I do believe that, with the efforts of all people concerned, we can solved the problems there. Thanks.Li Ming