How much money do you spend ( ) her ?

问题描述:

How much money do you spend ( ) her ?
A. on B. with C. in
不知道是选A还是选B
希望楼主能给建议!

这道题是填on为什么选A?? 用哪个公式???spend some time/money on something/somebodyspend some time/money in doing something