2) "Three-year simulation of five-year senior high school entrance examination"

3) The "Senior High School Entrance Examination Highlights" is a comprehensive question, and its answer is very detailed. You can understand it yourself and then ask the teacher.

4) Actually, I want to say that not everyone can work out the last question of the last big question. Do what you can, don't lose points, and work out the basic questions. I believe you will make great progress after a year of special research.