单项选择题

A knowledge of classical music is ______ to anyone who wants to apply for this job.

A．invariable
B．indispensable
C．invaluable
D．innumerable
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单项选择题
Two suspects have been ______ by the police for questioning.
A．retained
B．detained
C．repelled
D．excelled
单项选择题
Jane buys all the fashion magazines, and she always tries to dress in ______ with the latest style.
A．confirmation
B．proposal
C．conformity
D．variation
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