Because you are from Guangzhou, you are not familiar with your examination questions. Maybe my answer can only give you some advice.

You are only a sophomore, so I don't suggest you start to do difficult problems now, because some difficult problems are combined with the knowledge of senior three, which is often taken in the senior high school entrance examination.

Besides, you said your math was above average. I think it really doesn't make sense for you to do the finale without the help of the teacher.

Now you can review the knowledge of senior two and senior one, integrate this knowledge and preview senior three. The senior high school entrance examination is not as difficult as you think. Even if you finish the last question, you will lose points in the simple question, which is not worth the loss.

Yes, my answer is for reference only. ...