解析一道四级英语选择题（不定项）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

解析一道四级英语选择题（不定项）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
解析一道四级英语选择题（不定项）
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

解析一道四级英语选择题（不定项）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
D
base on 基于,依靠
本句which语句修饰宾语,on提前
教授发现很难找到支持这个新学说的论据.

A

官方的解释
① The professor could hardly find sufficient grounds _____ his
arguments in favor of the new theory.(2000.6)
A. to be based on B. to base on
C. which to base on D. on which to ba...

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官方的解释
① The professor could hardly find sufficient grounds _____ his
arguments in favor of the new theory.(2000.6)
A. to be based on B. to base on
C. which to base on D. on which to base
② The pressure _____ causes Americans to be energetic, but it
also puts them under a constant emotional strain.
A. to compete B. competing
C. to be competed D. having competed
①题为不定式做定语的固定形式，答案为D，②题为某些特定名词的定语结构，答案为A。在英语中有些名词，如动词变来的名词，形容词变来的名词，以及means, way, time, moment, reason等要求其后用不定式做定语，不定式没有体的变化。

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