↗①语气 / 措辞客气
↘③词汇 / 语法（言简意赅，长句最多25个字）
Dear Sir or Madam/To whom it may concern/Dear Mr. Dean Zhang,
I’m writing to inform you that I wish to moving to a new room next term. I prefer a single room, as I rind the present sharing arrangement inconvenient.
I must explain that the reason for dissatisfaction is my roommate’s inconsiderate behavior. For one thing, his friends constantly visit him; for another, he regularly holds noisy parties. In addition, he too often borrows my private things without my permission. Consequently, I find it difficult for me to concentrate on my studies.
I’m sure that you will agree that I must move into a room of my own, where I would be far from such distraction. I would be grateful if you would take my requirement into consideration, as well as provide me with a room, preferably not in the same building but as near to college campus as possible.
I’m writing to express my heartful gratitude. I’m referring to the unfortunate crash, when I was knocked off my bike by a taxi. But for your timely taking first aid and sending me to a nearby hospital, I fear that the consequence might have been much more serious.
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