數學 行政
Parent (Gao Yixuan, with a photo of the textbook contents page): Please tell the maths teacher that the school has already finished Units 2 and 3; next they will cover Unit 1 and Unit 4. The teacher has already taught 1.1 and 1.2, so please have him prepare 1.3-1.4. Yanna (XYF front desk): Noted, I've already told the teacher to prepare the lesson accordingly.