单选题Without facts   a pe

问题补充：

单选题Withoutfacts,apersoncan’tformacorrectopinion,forheneedstohaveactualknowledgehisthinking.A.which to be based onB.on which to baseC.which to be basedD.which to base

答案：

B解析本题可采取增元法。把句子的后半部分补全为：for he needs to have actual knowledge on which he bases his thinking . base on：建立……基础上。如Parents owe their children a set of solid values around which to build their lives。故选B。