一道定语从句选择题 主要还是考介词

题目

一道定语从句选择题 主要还是考介词
The poor man has never earned sufficient income.to support his family.
A.within which.B.in which.C.on which.D.beyond which
原文翻译 以及 具体理由

答案

　　选C.　　The poor man has never earned sufficient income on which to support his family.　　翻译：这个可怜的人从来没有获得足够的收入来维持他的家人（的生计）.　　on 有“靠,依靠”的意思,例如：　　The...