I heard that you are sad because you don't have good scores in the middle exam. I know that you are always working hard in studying, you failed this time just as a result of carelessness. Don't be sad about this any more. The middle exam is just a period test. The most important thing is the final exam. From now on, you should recognize your problem, and correct your deficiency as soon as possible. I believe that you will get high scores in the final exam.
Thank you for your concern. I disappoint the people who care about me because of the bad scores. Thanks for still caring my study in your busy time. In the last exam, I don't review the learning content, so that I can't solve many problems. Now I know my deficiency, I will correct this on time. In the later study, I will work hard. I hope that I could get great scores in the final exam. I also hope that you do well in your study and life.
Thank your for your concern in your busy time. I dare not tell you my score, because I am afraid you worry about me. But you finally have known it. I am sad for a period about my fault. With my friends' encouragement and consolence, I come out of this shadows. Now I work harder than ever before, I won't let this situation happen again.
Wish you all the best!