The first monthly exam in the history of grade one in junior high school reached 4 units before the exam. According to relevant data, the first monthly exam of senior one history requires at least 4 units to be studied according to the class hours, and 4 units before the exam. The first monthly exam in history is generally a proposition of school teachers, with a small knowledge, but the questions will be more detailed. Grasp the key points in class and review in time.