Without facts,we can’t form a correct opinion,for we need to have actual knowledge______our thinking.
#98472
A
which to be based on
B
which to base on
C
on which to base
D
which to base
推荐题目
The country has already sent up three unmanned spacecraft, the most recent          at the end of last March. 
#97890
A
has been launched
B
having been launched
C
being launched
D
to be launched
As a result of the serious flood,two thirds of the buildings in the area ______.
#98130
A
needs repairing
B
need repairing
C
need to repair
D
needs to be repaired
There was nothing we could do that day ____ him down but _____ him in the house.
#91726
A
calm, lock
B
to calm, to lock
C
calming, locking
D
to calm, lock