---You must what I have done for you before you leave.
问题描述:
---You must what I have done for you before you leave.
---Well,how much does it Is 100 dollars enough?
A.pay for,cost B.pay,spend C.spend,pay for D.pay,cost
答
D
pay for 为.付款.cost的意思是,某物花费.主语是物.spend的意思是,花费...干某事,主语是人.