Dear teachers and parents, hello, I am sorry to submit this critical letter because I failed the exam. I feel deeply guilty that I didn't get the expected results in this mid-term exam. I must be a little sorry for my parents' concern and teachers' teaching. I hereby submit this critical letter to apologize. Regarding my unsatisfactory mid-term exam results, I summed up the following reasons: First, my learning attitude is not good. In the first half of the semester, because sometimes I don't listen to the lecture in class, I often miss the knowledge points told by the teacher and delay my study. Secondly, I didn't review in time after class. In the first half of the semester, I have to say that not attending classes can make up for it by writing exercises after class. But for general reasons, I still didn't go back to the cram school, so I didn't have in-depth analysis and understanding of the knowledge points I didn't understand. Third, I'm under too much pressure. In fact, this kind of pressure is not only imposed by my parents, but also my parents' concern for me. I hope I can get good grades and have a bright future. But I failed my parents, so that I would feel nervous during the exam, and my hand holding the pen would tremble because I couldn't do the problem. There are many reasons for this poor performance, but in the final analysis, the fact that I didn't do well in the mid-term exam is already in front of me. While reflecting on my mistakes, I have focused my attention on the final exam. Here, I want to hand in a critical letter for the failure of this exam, pleading with my parents and teachers for forgiveness.