Without facts,we cannot form a worthwhile opinion,for we need to have factual knowledge ______ our thinking.
#98906
A
upon which to base
B
which to be based on
C
which to base on
D
to which to be based on
推荐题目
It’s time he _________ piano. Don’t you think he has wasted too much time online? 
#96148
A
stopped to take up
B
stops taking up
C
stopped to leave alone
D
stops leaving alone
The mother didn't know who ________ for the broken glass as it happened.
#91561
A
to blame
B
to be blamed
C
blamed
D
is to be blamed