单项选择题

A body, ______ it is in motion, would never stop itself if there were no friction.

A．where
B．by time
C．once
D．at the moment
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单项选择题
Every society has its own peculiar customs and ______ of acting.
A．ways
B．behavior
C．attitudes
D．means
单项选择题
I ______ the disdainful look in his eyes.
A．grumbled
B．resented
C．complained
D．dissatisfied
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