单项选择题

Mary spends a large ______ of time each day on the telephone.

A．amount
B．moment
C．period
D．number
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单项选择题
A little ______ is all some people need to keep doing a good job.
A．assurance
B．persuasion
C．encouragement
D．confirmation
单项选择题
Only the ______ of the general manager, who knew of John’s personal difficulties, saved him from being dismissed,
A．interrelation
B．interruption
C．intervention
D．interference.
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