Dear Sir or Madam,

　　I am writing to complain(that) my roommate who always has many friends visiting and even has parties in the room. These things were done(happen) so frequently that I couldn't work normally. So I have to inform you that I want to have a new room next term. And if it possible, a single room would be preferable.

　　For one thing, the next(half year) is my final term in the college, many things I have() to complete(be completed), so the relatively quiet environment is required for me(). For another, sometimes I must work at the(until) midnight. I am afraid this will interrupt the other in our room. Generally, I wish to draw your attention to my request.

　　An early response will be appreciated.

Sincerely yours,

Li Ming

　　Sahra点评：7分。这是一篇申请信，申请信是向收信人提出某个请求的信件，包含3个部分：1．提出请求。语言要简练。2．说明原因。这一部分需重点明确，论述充分。3．请求回复并表示感谢。应采用礼貌诚恳的措辞。此文是标准的3段式 ，大概意思都说到了。但是语言基本功这类还要加强，具体的词语和句子还可以写的更地道一些。读起来就更通顺了。