Withoutfacts,wecan’tformaworthwhileopinion,forweneedto...

问题详情：

 Without facts, we can’t form a worthwhile opinion, for we need to have factual knowledge ____ our thinking.

   A. which we base         B. upon which we base         

   C. which is based        D. upon which is based

【回答】

B

知识点：定语从句

题型：选择题