单项选择题

The local medical officer reported a serious ______ of food-poisoning.

A．state
B．incident
C．outbreak
D．event
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单项选择题
The purpose of the survey was to ______ the inspectors with all conditions.
A．in form
B．acquaint
C．instruct
D．announce
单项选择题
His influence over union members has ______ since his failure to strive higher wages for them.
A．destroyed
B．lowered
C．depressed
D．declined
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