There are no multiple-choice questions in the college entrance examination papers in Jiangsu Province and Shanghai, which are large and difficult. If you are a student in the area of curriculum reform, you can choose the questions in these two provinces and cities to improve your problem-solving ability and speed. Personally, I think I have practiced the questions in these two provinces and cities for two months, and my math level has been greatly improved, from 120 to 140, which is recommended.