This is a classroom. I can see desk, chair, a table, and a blackboard. There are a map and two pictures on the wall. How many windows can you see? I can see four. How many doors can you see? I can see one. The teacher is Mrs. Brown. She is standing at her table. The students are sitting at their desks. Are they writing? No, they are reading. What is Mrs. Brown doing? She is teaching. What are the students doing? They are studying