开头和结尾已为你写好。
文中词汇表达较丰富恰当,但学术词汇稍显不足;句法知识很棒,若增加一些从句的使用,文章会更出色;文章采用了适当的过渡词和衔接词,结构比较严谨。
Dear Mr. Principal, I am a senior student of our school. I’d like to say something about the canteen service in our school. To be honest,I'm content with the school canteen service.The hall is clean and tide,the foods are delicious and tasty,what is more,the servers of this canteen certainly did a splendid job with a genty and kind manner. However,there are some imperfections about it.For instance,the price is a little too high to afford for some students who don't have much tin money.In addition,the variety of dishes is lack of change despite dilicious taste.We also find that we are waiting too long to get the foods. Therefore,I hope these problems could be solved as soon as possible so that we can all enjoy the meal in the school. Thanks for your consideration. Sincerely yours, Li Hua