单项选择题

His dedication ______ the cause of education earned him the respect of his colleagues.

A．to
B．about
C．in
D．into
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单项选择题
The puppet power only survived the riotous (造反的) officer ______.
A．with six days
B．by six days
C．during six days
D．in six days
单项选择题
These tables showing the ups and downs of the world economy in the 1980's were compiled(汇编) ______ careful observation and detailed studies.
A．at the bottom of
B．in exchange for
C．in the name of
D．on the basis of
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