2. 外语
  3. The professor could hardly find sufficient grounds ______ his arguments in favor of the new theory.

The professor could hardly find sufficient grounds ______ his arguments in favor of the new theory.

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问题 The professor could hardly find sufficient grounds ______ his arguments in favor of the new theory.
选项 A、to be based on
B、to base on
C、which to base on
D、on which to base
答案D
解析 base A on B作“将A建立在B的基础之上”讲。例如：A good marriage is based on a talent for  friendship．美满的婚姻基于夫妇能相敬如宾。All progress is based upon a universal innate desire on the part of every organism to live beyond its income．世人莫不怀着一种与生俱来的欲望，要把支出超过收入，此乃一切进步的动力。
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