题目内容
Without facts,we cannot form a worthwhile opinion,for we need to have factual knowledge ______ our thinking.
A.upon which to base B.which to be based on
C.which to base on D.to which to be based on
A
解析:
全句意思为: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。故选A。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。参见必背句型2。
答案:A
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