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Without facts, we cannot form a worthwhile opinion for we need to have a factual knowledge ________ our thinking.

A.which to base on                        B.which to be based on

C.on which to be based                    D.on which to base

 

【答案】

D

【解析】

试题分析:考查定语从句:句意为:没有事实,我们就不能形成有价值的观点,因为我们的思考必须以真实的知识为基础。upon which to base our thinking是动词不定式短语作定语,该短语中介词必须放在which前。 答案是D

考点:考查定语从句

点评:定语从句的考查主要集中在句子成分的分析。如果从句中缺少主语,宾语,表语定语使用关系动词。如果从句很完整,则使用关系副词。

 

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