单项选择题

The electric fan does not work because of the ______ of service.

A．pause
B．break
C．interruption
D．breakdown
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单项选择题
We looked for a table to sit down, but they were all ______.
A．reserved for
B．engaged in
C．used up
D．taken up
单项选择题
I am ______ grateful for the many kindnesses you have shown my son.
A．excessively
B．much
C．certainly
D．exceedingly
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