单项选择题

______ work has been done to improve people' s living standard.

A．Many
B．A great many
C．A large number of
D．A great deal of
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单项选择题
In some countries ______ are getting richer and richer.
A．rich
B．the rich
C．fiches.
D．the riches
单项选择题
A judge must be ______ when weighing evidence.
A．interested
B．disinterested
C．separated
D．disconnected
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