题目内容：
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
"
参考答案：
选择题：The professor could hardly find sufficient grounds
- 题目分类：西安交通大学--英语三
- 题目类型：选择题
- 查看权限：VIP
C. which to base on D. on which to base
"