The topic should be appropriate, and it is not recommended to ask the sea. Remember the formulas and common conclusions before doing the problem, because the purpose of doing the problem is to broaden your mind and improve your speed. Don't think that if you do more questions, the foundation will be solid.

Suggestion: in a round of review, read the book carefully and be familiar with the formulas of vector, triangle, sequence and probability. Senior three did more special topics last semester and sorted out valuable problems (personally, everything that is not necessarily wrong is valuable). You can do more sets of questions next semester to practice speed and accuracy. Some good questions can be done several times every once in a while, and further strengthening the method may lead to some unexpected gains. You must ask questions when you study mathematics in senior three.

This is all my experience. I hope it helps you.