单选题The professor could hardly find sufficient grounds _____ his arguments in favor of the new theory.Aon which to baseBwhich to base onCto base onDto be based on
单选题
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
参考解析
解析：
句意：教授难以找到充足的论据来证明他赞成新理论的论点。此句中的先行词which在从句中作base on的宾语，此处考查的是名词+介词+which/whom+动词不定式结构的定语从句。
句意：教授难以找到充足的论据来证明他赞成新理论的论点。此句中的先行词which在从句中作base on的宾语，此处考查的是名词+介词+which/whom+动词不定式结构的定语从句。
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