I didn't listen carefully in class, I didn't devote myself wholeheartedly, I didn't fully understand the topic that the teacher finished, I didn't ask the teacher or classmates for advice, I didn't discuss the tangled places with my classmates, I didn't review well before the exam, I just ignored the exam and didn't take it seriously. From this time on, I will do a good job in reviewing, and ask teachers and classmates if I don't understand.