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
It is strictly ______ that access to confidential documents is denied to all but a few.
A．secured
B．forbidden
C．regulated
D．determined
单项选择题
After ______ for the job, you will be required to take a language test.
A．being interviewed
B．interviewed
C．interviewing
D．having interviewed
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