(1) First of all, you must listen in class. What the teacher said is more profound than that in the book, but it is closely related to the college entrance examination, which is very important!

(2) Then do more questions and think more, instead of doing things hastily. If you are right, you will regret if you are wrong, and you will take pains to reflect. If you encounter similar problems in the future, will you do it or make a mistake?

(3) Remember many formulas and theorems. You are not skilled in these things, and you can't do the questions, which requires you to practice your hands more.

Listening to lectures, doing problems and understanding are indispensable!