If you want to practice many difficult problems, it is recommended to use: sailing. The new class (available in the bookstore) is getting higher and higher (not easy to buy). Secondly, I haven't used this before, but my classmates think it's ok after using it. If you are previewing or the foundation is not very good, then it is recommended to use the five-year senior high school entrance examination for three years to simulate. A lot of knowledge is explained in detail, and the topic is not much bigger than the basic topic. May 3rd in junior high school is relatively simple (personal).

All the above are personal opinions and are for reference only.