题目

题型：不详难度：来源：

The house is finished at last. All their hard work has ________.

A．paid back

B．paid up

C．paid off

D．paid for

答案

C

解析

这题考查词组辨析：paid back报答，偿还，paid up全部还清，付清
paid off （努力）有回报，成功， paid for为…付钱，根据句意：这个房子最后完成了，所有的努力都没白费。选C。