1. Don't make the wrong problem set. The wrong thing is always wrong. Senior one won't, senior two won't, senior three still won't, and finally the college entrance examination is wrong.

2. The wrong problem set can only be read before the exam. This simply doesn't understand why the wrong set of questions should be used. If everything in a book is beyond your comprehension, and someone will spend a month brushing the questions you already know and never try to understand them, what is learning? Brush grades?

3. The wrong problem set only increases. If you can read your own set of wrong questions every day, you will soon find that something will be mastered quickly, so you need to remove this part. Some questions in the wrong set must be remembered quickly, while others should be remembered slowly. If the familiar question is not taken away earlier, when you mix the unfamiliar question with the familiar question, it is easy to have the illusion that I actually know this question. There are only things left in the wrong set that you really don't fully understand and remember. Make sure that you can deepen your study every time you ask the wrong question.

As for how to do it, you can refer to your own preferences. Whether you like copying questions or cutting books that don't like copying questions. It is important to understand how to use the wrong problem set.