在高中即将毕业之际，用英语给自己的学弟学妹们写一封信。信中应包括以下内容：一、高中三年的收获。二、在此期间你的不足之处或遗憾。三、大学生活即将面临的挑战。四、对高一高二学弟学妹们的建议。注意词数150左右，开头与结尾已经写好，不计入总词数。
Dear schoolmates,
As I am graduating, I'd like to write this letter to express my feelings before leaving school. As for me, it is the school life that colors my daily life. During the three years, I had a good time with teachers and classmates who were in favor of me. Besides, there is no doubt that I achieved lots of knowledge and skills which are good for my future study.
Nevertheless, there are also some things that I regret about. For instance, wasting too much time playing computers, I spent a little time in studying. Moreover, I regret arguing with my friends when I was in a low spirit.
Gone are the days when I studied in high school. Needless to say, there are many challenges in university where I will start my new life. Therefore, I should make every effort to study in university.
Here is some advice for you to take. Under no circumstances should you waste time doing things that aren't linked with study. Apart from this, it's high time that you should spare no effort to get good marks at school.
Good luck to all of you!
Yours