A driver stopped his car on a street side to have a rest.As he laydown in the seat and closed his eyes，a pedestrian（行人）came up and knocked at his windows to ask the time.The driver opened his eyes and looked at his watch."It's 8 a.m."he said.Then he went to sleep again.
But soon he was waken up because a second pedestrian was knockidg at the windows."Sir，do you have the time？"he asked.The driver looked at his watch again，and told the man it was 8：30.At this rate（如此下去），he could not have a good rest，so he wrote a short note and put it up on the window for all to see.It said，"I don't know the time."Again the man lay down in the seat for his sleep.A few minutes later a third person came along and began knocking at the window."Hey，sir，"he said."It's a quarter to nine.