看图补全对话。 A. Forty-two. B. It's on the first floor. C. No, it isn't. D. Yes, it is. E. In the canteen. F. It's on the second floor. 1. --Where is the washroom? -- _______________________________. 2. --Where is the canteen? --________________________________. 3. --How many students are there in your class? --________________________________. 4. --Where do you have lunch? --________________________________. 5. --Is the art room on the second floor? --________________________________. 6. --Is this the art room? --________________________________.