realize that my score in this English test is too bad and my grade decreased a lot. Thus, I need to work hard in future. I make a plan to do the following things. I will read our textbook for longer time than before, and I will do more practice questions. If I have some questions, I will ask my teacher right away. Also, I will listen to the lecture much more carefully, and work harder on our homework. And I will preview and/or review our textbook for at least 30 minutes everyday after I finish my homework. I promise that my grade will increase after I make these efforts. Work hard!
这次英语考试成绩不太好,成绩下降了许多,所以的努力了,要多看书,多做试题,不懂得就要问老师,上课一定要专心听课,认真完成作业,每天放学做完作业后,要看至少30分钟的书,下次一定要把成绩提上去,多多努力
PS :可以适当加一些关于暑假之类的字眼