问题补充：
Is this the piano your familoy for over eighty years?
A. belonged to
B. belongs to
C. belonged
D. belonging to
答案：
A. belonged to
B. belongs to
C. belonged
(答案→)D. belonging to
解析：本题考查非谓语动词。句中belonging to作定语，修饰名词the piano，之间为主动关系，故用现在分词。句意：这是属于你家超过80年的钢琴么？
