Describe an important letter you wrote.

不知道楼主需要的英语等级是多少的？
但是可以参考下：
I have written a letter to my mother which was a homework from my teacher. In the beginning, I don't want to write the letter because I had quarreled with my mother the day before. However, after I returened home, I found my mother had already prepared the dinner for me and I felt so guilt about my thought. So I wrote the letter as soon as possible when I finished my dinner. In the letter, I told my mother how I love her and how moved by her patience and forgiveness.