Mr. Hitlon was a tall and thin man. He seemed weak and could not hurt anybody. He killed several enemy soldiers when he was in the army. And he was hurt in the war and had to return to the town where he was born. He found a job in the factory. He kept the gate for thirty-two years and didn't make any mistakes. He knew everybody in the factory well and even knew where they lived. The factory made several kinds of televisions. Some of their parts were expensive. Nobody dared take anything away when the old man was on duty. A few young men thought he was old and wanted to steal something one night. Mr. Hitlon found them as soon as they went in the workplace. They began to fight with him but before long they found they were no match for him and were going to run a- way. But it was too late. The old man caught them all and called the police station. From then on no- body dared steal anything there. One morning a few people came. At the gate Mr. Hitlon stopped them and said,' Show your pass to me, please. 'A man who seemed an official called out, 'Don't you know who I am?' Mr. Hitlon had a look at him and said to his helper, 'This gentleman doesn't know his name. It seems that he needs our help?Mr. Hitlon had to leave the army because ______.A．the factory needed a gatekeeperB．he had killed some enemy soldiersC．he was too weak to stay in the armyD．the enemy hurt him in the war