问题
选择题
After many years’ hard working, his parents managed to ________ the debts for his education at university.
A．pay for
B．pay back
C．pay off
D．pay out
答案
答案：C
短语辨析. A.赔偿 B. 偿还 C.付清 D.付出钱.根据题意,辛勤工作多年之后,他的父母设法还清了他上大学的债务.故选C.