One day a poor old man had lost his way andcalled the police station for help. A police officeranswered " this is the police station, what'syour trouble?" " I'm lost, I can't findmy way home. Can you help me?" "Stay whereyou are and we'll send a car to take you home." Whenthe car arrived at the old man's house, his wife openedthe door, came out, and thanked the police officer. After thepolice officer had left, his wife asked him how could helost his way home. "I was tired and I didn't want towalk home, so I had a clever idea."(最好不要用policeman, 有点歧视女性的意思。police officer 包括了男女警察。)