base on用法

题目

base on用法
The professor could hardly find sufficient grounds___ his arguments in favour of the new theory.
A.to be based on
B.to base on
C.which to base on
D.on which to base
选D,为什么,

答案

这个教授找不到足够证据来证明他偏向这个新的理论的逻辑.
His arguments are based on grounds.
"on which to base" 表示后者,"arguments",是建立在前者上的,"sufficient grounds".
Hope this helps.