First of all, because of the questions in it, and its overall difficulty is relatively high, and then we all choose some real questions of the exam, which are very representative and there are not many original questions, so I still recommend some top students who study better to do this workbook. In fact, there is not much difference between the two types of questions, which are divided into basic questions and difficult questions. It's just a big difference, and a very detailed workbook will be given in it. You can modify the answers after you finish the questions, so that by going up one flight of stairs can master the knowledge.