Question

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

Answer 1

D

試題分析：考查定語從句：句意為:沒有事實，我們就不能形成有價值的觀點，因為我們的思考必須以真實的知識為基礎。upon which to base our thinking是動詞不定式短語作定語，該短語中介詞必須放在which前。 答案是D
點評：定語從句的考查主要集中在句子成分的分析。如果從句中缺少主語，賓語，表語定語使用關系動詞。如果從句很完整，則使用關系副詞。