answer: Harry is stopped by a police officer because he's driving over the speed limit. The policeman warns him not to do it again.
documents: #Person1#: Look, Harry! That policeman's waving to you. He wants you to stop. 
  #Person2#: Where do you think you are? On a race track? You must have been driving at seventy miles an hour. 
  #Person3#: I can't have been. 
  #Person2#: I was doing eighty when I overtook you. Didn't you see the speed limit? 
  #Person3#: I'm afraid I didn't, officer. I must have been dreaming . 
  #Person1#: He wasn't dreaming, officer. I was telling him to drive slowly. 
  #Person3#: That's why I didn't see the sign. 
  #Person2#: Let me see your driving-license. I won't charge you this time. But you'd better not do it again! 
  #Person3#: Thank you. I'll certainly be more careful. 
  #Person1#: I told you to drive slowly, Harry. 
  #Person3#: You always tell me to drive slowly, darling. 
  #Person1#: Well, next time you'd better take my advice!