It is not easy to improve in a short time, but you can still spend time on consolidating textbook knowledge. If you are a science student, you should look at biology, Chinese, English, mathematics and physics, and you should look at textbooks. You can't do many questions. You still need to improve your English, and you need to do several sets of papers.
That's what I did last year, and it worked very well.
I wish you the first place next year.
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