Charlie works in a post office. His father lost his job five years ago and his mother is often ill. And he has two brothers and a sister. He works hard and tries his best to buy enough food for his family. Last month his family had to move to an old house outside the city. It's farther from the post office and he has to get up early in the morning in order to catch the 6:30 train. The head of his office is strict and everybody has to get there on time. He knows what it'll mean if he's late. A friend of his had pity on  him and lent his old car to him. The young man was happy and from then on he could go to work by car. Last Saturday Charlie went to buy some medicine for his mother. Bad luck! When he came out of the shop, he couldn't find the car. He was quite worried and began to look for it in front of the shop but he didn't find it. Suddenly he saw a woman parked a car there and hurried into the shop. Charlie saw the car wasn't locked. He got on it and drove it at once. He was afraid the loser would run after him and drove fast. A truck hit it at a crossing and he lost consciousness.  This morning the young man came back to life and saw there were a few policemen standing by his bed. He asked, "Where am I?" "In Room 103." "In hospital or in prison ?" Charlie has to get to his office on time because   _  .
the head is strict with them he wishes to be praised he's usually on duty he's afraid to be fired