A、When he was having dinner. B、When he was at the police station, C、When he was taking a bus back home. D、When he was walking do

When I was walking down the street the other day, I happened to notice a small brown leather wallet lying on the sidewalk. I picked it up and opened it to see if I could find out the owner’s name. There was nothing in side it except some change and an old photograph -- a picture of a woman and a young girl about twelve years old, who looked like the woman’s daughter. I put the photograph back and’ took the wallet to the police station. That evening I went to have dinner with my aunt and uncle. They had also invited a young woman so that there would be four people at the table. Her face was familiar. I was quite sure that we had not met before, but I couldn’t remember where I had seen her. In the course of the conversation, however, the young woman happened to mention that she had lost her wallet that afternoon. All at once I realized where I had seen her. She was the young girl in the photograph, although she was now much older.  She was very surprised,  of course, when I was able to describe her wallet to her. Then I explained that I had recognized her from the photograph I had found in the wallet. My uncle insisted on going to the police station immediately to claim the wallet. As the-police sergeant handed it over. he said that it was amazing that I had not only found the wallet, but also the person who had lost it.