There is only one book, and the amount of knowledge is not much, which belongs to public subjects. But it is not easy to learn well, and it involves some knowledge points in grade three. If you want to take the exam, I suggest you work harder and find a few questions from previous years to study them carefully. Special note: the subject of mathematics is a little regular. If you collect the annual test questions, you will find that the questions given at one time are relatively simple.