补全对话。 Dong: Alice, what were you doing when the fire started? Alice: 1. Dong: Did you smell smoke? Alice: 2. Dong: Where was she? Alice: She was playing in the gym. Dong: 3. Alice: He was eating lunch in the cafeteria. 4. Dong: When the fire started, I was talking on the telephone. Alice: What did you do? Dong: 5. Alice: Good for you! A. What was John doing? B. I was studying in the library. C. I called the fire department. D. No, but Meimei did. E. Where were you, Dong?