单项选择题

It has always been the ________ of our firm to encourage workers to take part in social activities.

A．plan
B．campaign
C．procedure
D．policy
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单项选择题
There were many people present and he appeared only for a few seconds, so I only caught a ________ of him.
A．glance
B．glimpse
C．look
D．sight
单项选择题
The illness from which Mary is suffering has now been ________ as hepatitis(肝火).
A．diagnosed
B．determined
C．deduced
D．discovered
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