The instructions are comprehensive and generally suitable for middle-level students. Please read the instructions before you do it. There are many questions in the book, which can be used as a question bank; After 50 or 30 years, I don't think it's much use in high school. I used it in high school. It is better to sum up the knowledge ~ ~ basically it is to read the whole textbook. Others have never been used ~ ~ but you should do it if you buy it. If you don't have time, choose some new good questions to do, browse them first, and do what you haven't seen ~ ~