单项选择题

We are at your service. Don’t ________ to turn to us if you have any problems.

A．beg
B．hesitate
C．desire
D．seek
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单项选择题
My boss did not _______ from his desk when I entered his office.
A．look out
B．look around
C．look down
D．look up
单项选择题
We tried to find a table for seven, but they were all _________.
A．given away
B．kept away
C．taken up
D．used up
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