单项选择题

It is useful to be able to predict the extent ______ which a price change will affect supply and demon.

A．from
B．with
C．to
D．for
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单项选择题
Millions of workers were on the streets in the greatest______ of working class solidarity this country has ever seen.
A．demonstration
B．explanation
C．presentation
D．communication
单项选择题
A drunk man walked in, ______ both in appearance and odor.
A．repulsive
B．reluctant
C．reproachful
D．reputed
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