为什么选Dthe professor could harldy find sufficient grounds_____

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为什么选D
the professor could harldy find sufficient grounds_____his arguments infavor of the new theory
A.to be based on B.to base on
C.which to base on D.on which to base
不能使A吗

选D
base on固定搭配：基于；以.为根据
to base his arguments on sufficient grounds
sufficient grounds 先行词提前,on which引导状语从句
PS：理论上来说如果把C的句子改成the professor could hardly find the sufficient grounds which to base his gruments infavour of the new theory on也是可以的.

为什么选Dthe professor could harldy find sufficient grounds_____ base on用法The professor could hardly find sufficient grounds_ The professor could hardly find sufficient grounds __his arg The professor could hardly find sufficient grounds( ) his ar 英语翻译The professor could hardly find the sufficient grounds__ The professor could hardil find sufficient grounds ___ The professor could hardly find sufficient grounds___his arg 1.The professor could hardly find sufficient grounds ______ 英语翻译1,The professor could hardly find sufficient grounds on The professor could hardly find sufficient grounds on which The professor could hardly find sufficient grounds _____his The professor could hardly find sufficient grounds____his ar