题目内容
The professor could hardly find enough reasons ____ 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
D
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题目内容
The professor could hardly find enough reasons ____ 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
D