题目内容：

Without facts,we can not form a worthwhile opinion,for we need to have factual knowledge ____...
Without facts,we can not form a worthwhile opinion,for we need to have factual knowledge ____our thinking.
A.which to be based on
B.upon which to base
C.which to base upon
D,to which wo be based
which to do 是个什么句式 A中的which to be done 是表示被动?分析下句子成分 ,如果A的on提前可以吗

优质解答

which在这里是用作定语从句的一个代词,指代factual knowledge,根据上下文含义,我觉得是选择B项,比较合适,factual knowledge upon which to base our thinking,表示在实际知识基础上的我们的思考.
A中的which to be done表被动,个人觉得on可以提前