单项选择题

She ______ for a while and was unable to make a decision, so she asked for my help.

A．flickered
B．glittered
C．faltered
D．blinked
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单项选择题
It is not enough to observe behavior and ______ them with physiological events that occur at the same time.
A．correlate.
B．comply
C．correspond
D．pertain
单项选择题
In recent years there has been a ______ increase in the cost of living; many families have to depend on the federal aids.
A．ponderous
B．powerful
C．significant
D．violent
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