A story is told about a soldier who was finally coming home after having fought in Vietnam. He called his parents from San Francisco. "Mom and Dad, I'm coming home, but I've a favor to ask. I have a friend. I'd like to bring him home with me." "Sure," they replied, "we'd love to meet him." "There's something you should know," the son continued, "he was injured pretty badly in the fighting. He stepped on a land mine(地雷) and lost an arm and a leg. He has nowhere else to go, and I want him to live with us." "We're sorry to hear that, son. But, maybe we can help him find somewhere to live." "No, Mom and Dad, I want him to live with us." "Son," said the father, "you don't know what you're asking. Someone with such a handicap would be a terrible burden to us. We have our own lives to live, and we can't let something like this interfere with our lives. I think you should just come home and forget about this guy. He'll find a way to live on his own." At that point, the son hung up the phone. The parents heard nothing more from him. A few days later, however, they received a call from the San Francisco police. Their son had died after falling from a building. The police believed he had killed himself. The grief-stricken(悲痛欲绝的) parents flew to San Francisco and were taken to the city morgue(太平间) to identify the body of their son. They recognized him, but to their horror they also discovered something they didn't know, their son had only one arm and one leg.221.The soldier called his parents from San Francisco（）..A.before going to fight in VietnamB.after having fought in VietnamC.after writing a letter to his friendD.before making his mind to stay in the army222.The soldier told his parents that he wanted them to（）.A.meet his friend in the armyB.find a place for his wounded friend to live inC.move to San FranciscoD.agree to his plan that he would bring his wounded friend home and live with them223.His father considered his plan（）.A.unacceptableB.wiseC.usefulD.selfish224.A few days later（）.A.the parents were told by the police that their son had been sent to prisonB.the parents were told by the police that their son had killed himselfC.the parents heard something more from their sonD.the parents received a telegram from the San Francisco police225.The son killed himself because（）. A.he was unable to find a jobB.his father's words greatly disappointed him and he didn't want to be a burden to his parentsC.his parents didn't agree to his planD.he had lost everything in Vietnam