问题
选择题
Without facts,we can’t form a correct opinion,for we need to have actual knowledge____ our thinking.
A．which to be based on
B．on which to base
C．which to base on
D．which to base
答案
答案：B
本题考查“疑问词+不定式”的用法。把句子的后半部分补全为：for we need to have actual knowledge on which we base our thinking。 base… on…把…建立……基础上。