M: Hi, Mum. W: There you are. I'm getting worried. It's so late. M: Yes. I ran into Linda and we went to a pub. She told me a funny thing. W: Oh? What was that? M: Well, she was driving home after work, and she suddenly saw an old lady on her hands and knees in the middle of the road. W: Really? M: Yes, Linda was so shocked that she stopped suddenly and the car behind crashed into hers. W: Was her hurt? M: No. W: And what was the old lady doing? M: I am just coming to that. So Linda got out of her car and saw the old lady pick up something and walk away. W: Lucky indeed. Linda didn't run her over. M: Then a policeman came. But he didn't believe what Linda said. W: Well... M: Luckily there was a witness, a man waiting for a bus. He saw it all. Guess what the old lady was doing? W: I haven't the slightest idea. M: She was looking for her gold tooth. W: A gold tooth? M: Yes, it fell out as she was crossing the road. The witness heard her saying, "Oh, my gold tooth...", Question: Why did the son come back late? (A) He hurt his hands and knees. (B) He went to a pub with Linda. (C) He waited a long time for the bus.
(B) He went to a pub with Linda.