A boy lost his left arm in an accident，but he didn't give up his（76） 　　．When he was eleven years old．he （77） 　　（decide） to study judo（柔道）from an old great judo coach．The boy was doing well，but after three （78） 　　（month） training，he found that the coach had told him only one action．"Sir，"the boy（79） 　　（final） said．"shouldn't I learn more actions？"This is the only move you know，but this is the only action you'll need to know．"the coach replied．Not quiet understanding，but believing in his coach，the boy kept （80） 　　（practice）．

Several weeks （81） 　　（之后），the coach took the boy to a competition．Surprising himself．the boy easily won his （82） 　　（one） two matches and came to the finals．This lime，his opponent was bigger，（83） 　　（strong） and more experienced．For a while，the boy appeared to be defeated．but soon his opponent made a big mistake，he lost his guard．Immediately，the boy used his move to defeat his opponent and won the match and （he competition．He was the （84） 　　（冠军）

On the way home，the coach （85） 　　（tell） the boy that he taught him only the action was to let his greatest weakness become his greatest strength．