One day, Mr. Smith drove his car to meet his friends at the station. When he found there was still quite some time before the train arrived, he  to take a short sleep. He was about to fall  when a young lady came and asked him the time. Mr. Smith opened his eyes and answered “half past eight”. With a “Thank you”, the woman  . After a short while this happened, so Mr. Smith wrote “I don’t know the time!” on a piece of paper and put it on the window of his car. But only a few  later, an old man came and woke him up, “Hi, young man, I can tell you the time, its nine o’clock now.”