The criminal always paid ______ cash so the police could not track him down.
问题描述：
The criminal always paid ______ cash so the police could not track him down.
A.on B.by C.for D.in
答
答案是D,in cash 是用现金的意思,翻译为：这个罪犯老是用现金消费,所以警察很难抓到他