Unit 90: Prepositions: place and movement 📍 TRI ĐỨC ENGLISH 2026 • Pre-Intermediate UNIT 90 Prepositions: place and movement LÝ THUYẾT TỪ VỰNG A. At, on and in AT: Tại một điểm I met her at the bus stop. He's at work. ON: Trên bề mặt The book's on the desk. They sat on the floor. IN: Trong không gian/vùng He's in the kitchen. She lives in Poland. Common mistakes: I met them at the airport (NOT ...