actuall knowledge ---------our thinking.
问题描述：
actuall knowledge ---------our thinking.
A which to be based on
B upon which to base
C which to base upon
D to which to be based
C
答
Bbase A on/upon B,将A建立在B的基础上base thinking on/upon knowledge将思想建立在知识的基础上knowledge带的是一个定语从句,which to base our thinking upon.为了强调介词与先行词的关系,或习惯问题,将介词upon...