The professor could hardly find sufficient grounds _____his arguments in favor of the new theory.
选项:
A: to
B: to
C: which
D: on
发布时间:2024-06-01 11:28:31
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A. on which to base B. which to be based on C. to base on which D. on which to be based
选项: [object Object] [object Object] [object Object] [object Object]