Question

【题目】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. on which to be based

Answer 1

【答案】B

【解析】考查定语从句。句意：没有事实作为依据，我们无法形成正确的观点，因为我们需要依据事实来思考问题。用不定式作定语修饰前面的名词，构成have sth to do，不定式用主动表被动，故A/D不错误的。如果用“疑问词+不定式”作定语，那么不定式中的介词要放在疑问词之前。该句也可写成：...for we need actual knowledge to base our thinking on，故选B。