问题补充：
Without facts, a person can not form a correct opinion, for he needs to have actual knowledge his thinking .
A. on which to be based
B. on which to base
C. which to be based
D. which to base
答案：
A. on which to be based
(答案→)B. on which to base
C. which to be based
D. which to base
解析：考查定语从句。base...on...把......建立在......的基础之上，排除C、D；base的逻辑主语是a person，与base是主谓关系，不用被动语态，排除A。故选B。
如果觉得《Without facts a person can not form a correct opinion for he needs to have actual knowle》对你有帮助，请点赞、收藏，并留下你的观点哦！
