单项选择题

We have a high regard for Prof. Joseph because he always ______his principles.

A．lives on
B．lives up to
C．lives down
D．lives with
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单项选择题
There are not many teachers who are strong ______of traditional methods in English teaching.
A．sponsors
B．contributors
C．advocates
D．performers
单项选择题
He did not change his position so much as ______its severity.
A．alter
B．vary
C．modify
D．convert
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