单选题 5.  Lily plays ______ piano very well, but she doesn't make a living by teaching piano.
【正确答案】 A
【答案解析】[考点] 冠词
play the piano弹钢琴；teach piano教钢琴。句意为：莉莉的钢琴弹得很好，但她却不靠教钢琴谋生。