The professor could hardly find sufficient grounds _____his arguments in favor of the new theory.
A.to be based on | B.to base on |
C.which to base on | D.on which to base |
推荐套卷
The professor could hardly find sufficient grounds _____his arguments in favor of the new theory.
A.to be based on | B.to base on |
C.which to base on | D.on which to base |