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    A short young man was running behind a bus which was full of passengers. But the bus still ran at a great speed. 
 
 
   "Stop, stop, " a passenger looked out of the window, and shouted at the young man, "you can't catch it ! " 
 
 
   "I must," the young fellow said, out of breath, "because I'm only driver of the bus." 
 
 
 
 
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