单项选择题

It is well known that knowledge is the ______ condition for expansion of mind.

A. incompatible
B. incredible
C. indefinite
D. indispensable
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单项选择题
I hope that the little ______ I've been able to do has been of some use.
A. which
B. what
C. that
D. when
单项选择题
A man's worth lies not （） in what he has as in what he is.

A. so much
B. much so
C. too much
D. much too
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