The professor can hardly find sufficient grounds ______ his argument in favor of the theory.
A.which to base on
B.on which to base
C.to base on which
D.which to be based
The professor can hardly find sufficient grounds ______ his argument in favor of the theory.
A.which to base on
B.on which to base
C.to base on which
D.which to be based
B
base his argument on sufficient grouds