I suggest you studying hard and building a strong body during your high school lives. Only in this way can you achieve more and have a better future.

    亲爱的同学们，
    我即将毕业了，在我离开学校之前，我写下这封信来表达我的感情。回顾过去三年的高中生活,我感到很自豪,我收获了很多,除了学习到不同的科目的丰富知识外,我还学会了如何成为一个合格的学生或一个真实的人。通过老师的帮助,我学习到诚信的重要性,变得自信和热情，我非常感谢老师无私的奉献。
    尽管我已经取得的成果,但我还是对我的高中生活充满遗憾。我想我应该锻炼更多,而不仅仅知识学习。毕竟,健康对我们所有人来说都是至关重要的。
    高中毕业后,我将进入大学,一个我可以遇见许多挑战的地方。我将住在学校而不是住在家里,我需要学会独立。如何与来自不同城市的学生也是一个挑战。
    我建议大家在高中生活里努力学习和锻炼一个强壮的身体。只有用这种方式你才能取得更大的成就和收获一个更好的未来。
　　4.

       Dear schoolmates,

　　As I am graduating, I’d like to write this letter to express my feelings before leaving school.I have experienced a lot over the past three years. First, I want to show my thanks to all my teachers. They are very kind and give me a lot of help. I know how to express myself in public, how to feel the beauty of nature and how to smile when I was in trouble. I think these are valuable memories that I will never forget.

　　However, I also have some regrets. I failed in an English speech competition, which made me very sad. I wanted to improve myself.

　　I will study in a college. It will be a great challenge for me. So, I must study hard now and prepare for the coming College Entrance Examination. I want to be successful.

　　Finally, there are some suggestions that I want to offer to you. Study hard and you will have a bright future. Listen carefully to your teachers and parents, and you will succeed in different kinds of exams. Keep fit, or you will not have enough energy to face different types of difficulties. Only in these ways can you enjoy your school lives.
   
    亲爱的同学们，
    我即将毕业了，在我离开学校之前，我写下这封信来表达我的感情。在过去的三年里我经历了很多。首先，我要对我所有的老师表示感谢。他们都很好，给了我很多帮助。在公众面前我知道如何表达自己，如何去感觉自然的美，如何在我有困难的时候时刻保持微笑。我觉得这些都是宝贵的记忆，我永远都不会忘记。
    然而，我也有一些遗憾。在一次英语演讲比赛中我失败了，这使我非常难过。我想要通过学习来提高我自己。
    我将要在大学学习了。这对我来说将是一个巨大的挑战。所以，我现在必须努力学习,为即将到来的高考做准备。我想要获得成功。
    最后，我还有一些建议,想提供给大家。努力学习，你就会有一个光明的未来。仔细听取你的老师和家长给予的意见，在不同类型的考试中，你会获得成功。保持健康的身躯，否则你将不会有足够的精力去面对即将面临的不同的困难。只有通过这些方式，你就能享受你的学校生活。
　　5.

       Dear schoolmates,

　　As I am graduating, I’d like to write this letter to express my feelings before leaving school. During the past three years in high school, I have really achieved a lot. Through the study of Chinese, I have a better understanding of the Chinese culture; through the study of Mathematics, I equip myself with a more flexible mind; through the study of English, I grasp a new language. I pretty appreciate what teachers have done for me!

　　However, I also have some regrets. I’m so occupied in my study that I spend little time participating in various activities. But I will make up for it in my college life.

　　In September this year, I will step into my ideal university. There must be different challenges waiting for me. To tell you the truth, I will have difficulty in adapting to an adult life. Anyway, I will try my best to make it.

　　Last but not least, I’d like to give you some suggestions. Firstly, always feel optimistic about your lives and you will be successful. Secondly, make a target and you can study with more concentration. I believe all of you can live your dreams in the end!

    亲爱的同学们，
    我即将毕业了，在我离开学校之前，我写下这封信来表达我的感情。在过去的三年高中生活，我真的收获了很多。通过在中国学习，我可以更好的了解中国的文化。通过学习数学知识，我为自己配备了一个更灵活的头脑。通过英语的学习,我掌握了一门新的语言。我非常感谢我的老师为我所做的一切!
    然而，我也感到有一些遗憾。我因为忙于我的学习,我只有很少的时间去参加各种活动。但我会在我的大学生活里弥补这个不足。
    今年九月，我将进入到我理想的大学。那里必定有不同的挑战在等着我。实话告诉你们,我可能将难以适应大学的生活。无论如何,我将尽我最大的努力去尝试做到。
    最后但并非最不重要，我想给你们一些建议。首先，对你们的生活要保持乐观心态，你就会成功的。其次，制定一个目标，你可以学习的更加集中。我相信最后你可以实现你的梦想!