Second, we must understand what has been wrong.
Third, do the questions, do some targeted questions, from simple to complex, from shallow to deep. Now is the review stage, try to do some comprehensive questions. For example, functions, whether abstract or compound, have the same characteristics, which are nothing more than these problems: definition domain, range, monotonicity, parity, maximum, periodicity and so on. Try to string together what you have learned to form a knowledge chain.
A round of review is the best time to rise. Catch it. Maybe you didn't know before, you can make up a lot at this time.