She would lend me the money if I promised to within a month.
A. bring it back
B. pay for it
C. pay it back
D. pay it out
网友回答
A. bring it back
B. pay for it
(答案→)C. pay it back
D. pay it out
解析：考查词组：A. bring it back 带回B. pay for it付钱C. pay it back偿还D. pay it out付出，惩罚，句意：如果我答应一个月之内还钱，她会把钱借给我。选C。