2. the real question of the college entrance examination. Among the numerous review papers, the real questions of college entrance examination over the years are the most worthy of study because of their accurate and unified scope, reasonable distribution of important and difficult points and standardized reference answers. College entrance examination questions can be trained mainly in two ways. One is to specify the time to do the questions, simulate the college entrance examination scene for training, and improve the speed of solving problems and the test-taking status of candidates. The other is to classify the real questions of college entrance examination over the years and carry out special training for a certain type of questions in order to achieve an effective breakthrough in this type of questions.