At Harton College, there are many rules．Fifteen-year-old boy Bob Sanders often break these rules．
The boys must return to school by six o'clock．One afternoon Bob walked to the town．He looked at the shops and then went to the cinema．After the film, it was 8 o'clock．He walked back to Harton College as fast as possible．
When he arrived, the main entrance was locked．He looked up at the window．It was on the third floor．He couldn't climb up the wall very easily．Then he saw another open window on the ground floor．It was the window of the headmaster's study, and no one was there．He quickly climbed and jumped into the room．Just then he heard a noise．Then someone turned on the light in the corridor(走廊)．Bob had to hide under the sofa．One minute later, Mr Mason, the headmaster, came in．He turned on the light and then he sat down on the sofa and began to read a book．
Bob lay under the sofa as quickly as possible．He looked at the headmaster's shoes and socks for nearly an hour．
Finally, the headmaster closed his book and walked towards the door．
“Thank heavens, he didn't find me under the sofa!” thought Bob．
Then Mr Mason stopped and spoke to the sofa．“Would you turn off the light when you leave?” He said and left the study．
(1)
Bob is 16 years old．
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(2)
The students must return to school by 6 o'clock．
( )
(3)
The school gate was locked when he returned to school．
