单项选择题

She then instructed her subjects to ______ these postures as precisely as possible.

A．illuminate
B．lubricate
C．duplicate
D．emigrate
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单项选择题
He was ______ on the telephone so I asked him to speak more clearly.
A．muttering
B．compiling
C．groping
D．certifying
单项选择题
There's a shop in town which sells all the latest photographic ______.
A．articles
B．wares
C．commodities
D．apparatus
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