Without facts,we can’t form a correct op...

Without facts,we can’t form a correct opinion,for we need to have actual knowledge____ our thinking.

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

B 【解析】本题考查“疑问词+不定式”的用法。把句子的后半部分补全为：for we need to have actual knowledge on which we base our thinking。 base… on…把…建立……基础上。

考点分析：

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