题目内容
Without facts, a person can not form a correct opinion, for he needs to have actual knowledge ______his thinking .
A.on which to be based B.on which to base
C.which to be based D.which to base
B
【解析】
试题分析:考查定语从句。base...on...把......建立在......的基础之上,排除C、D;base的逻辑主语是a person,与base是主谓关系,不用被动语态,排除A。故选B。
考点:考查定语从句
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