问题
选择题
The professor could hardly find sufficient grounds ______ his arguments in favor of the new theory. |
A. on which to base B. which to base on C. to base on D. to be based on |
答案
答案:A
The professor could hardly find sufficient grounds ______ his arguments in favor of the new theory. |
A. on which to base B. which to base on C. to base on D. to be based on |
答案:A