A driver stopped his car on a street side to have a rest. When he sat in the seat and closed his eyes, a pedestrian   came up and knocked at his window to ask the time. The driver opened his eyes and looked at his watch, "It is 8 o'clock." He said. Then he went to sleep again. But soon he woke up because a second pedestrian was knocking at the window, "Sir, do you have the time?" he asked. The driver looked at his watch again and told the man it was 8:30. If it happened again, he could not have a good rest. So he wrote a short note and put it on the window for all the people to see. It said, " _ " Again the man sat in the seat and slept. A few minutes later a third pedestrian came along and began knocking at the window. "Hey, sir," she said, "It's 8:45." The first pedestrian knocked at his window to   _  .
wake him up take his car ask the time buy his car