Analysis of test questions: ① During the period of 1924- 1927 National Revolution; (2) It was 1946 at the beginning of the liberation war; ③1919 during the May 4th Movement; (4) We are in the confrontation of 1927- 1937, so we choose C. ..

Comments: Sorting multiple-choice questions: Arrange some historical facts or phenomena in chronological order, geographical location, content and other ways to test students' comprehensive grasp of historical knowledge.