Chapter 355: Great

After dealing with the black sheep, the old principal asked seriously: "What is going on with Li Yun's test paper? Why did he write two answers? Did someone change it secretly!" In an instant, all the math teachers shook their heads quickly. "No, it's not me, the principal, it's really not me!" The former math group leader almost cried and waved his hand to indicate him. If you just leak your results in advance, it's just a matter of punishment within the school, but if you secretly modify...