The house is finished at last. All their hard work has .A. paid backB. paid off C. paid up

The house is finished at last. All their hard work has .
A. paid back
B. paid off
C. paid up
D. paid for

A. paid back(答案→)B. paid off C. paid upD. paid for解析：短语辨析。A归还；偿还；B付清；努力得到回报；集合句意可知B正确。句意：房子终于建好了。所有的努力工作都得到了回报。

谢谢了