I promised him_____ him back the money from my next month's salary.

问题描述:

I promised him_____ him back the money from my next month's salary.
横线上填什么?有下面几个选择
A.to take B.to bring C.to pay D.to return
可我觉得已经有back了,怎么还能用return呢?return里面含有 back的意思了啊

C.to pay
答案错了
尽信书不如无书