单项选择题

You should be relieving me of duty at 10: 30, but don't hurry if it's inconvenient; I'll hang on till you arrive.

A．turn on
B．look over
C．keep on
D．take over
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单项选择题
Mario was awarded the medal for displaying professional ______ of the highest order in the rescue attempts two weeks ago.
A．solution
B．supervision
C．intelligence
D．competence
单项选择题
Gaining acknowledgement from fellow workers and managers gives a person a sense of importance in society.
A．admittance
B．permission
C．recognition
D．denial
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