单项选择题

It"s no use ringing me up at the office this week because I"m ______.

A．by my leave
B．at leave
C．in holidays
D．on holiday
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单项选择题
You must ______ the facts and should not run away from the truth.
A．look
B．sight
C．front
D．face
单项选择题
This kind of work is ______ me.
A．unfamiliar with
B．unfamiliar by
C．unfamiliar to
D．not unfamiliar of
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