单项选择题

The White House and other federal buildings were ______ as a plane enters the restricted airspace.

A．vacated
B．empty
C．deserted
D．evacuated
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单项选择题
Let's ______ this has never happened.
A．make believe
B．make to believe
C．to make believe
D．to make to believe
单项选择题
The professor ______ his habit of getting up early in the morning to do writing all his life.
A．projection
B．retained
C．retailed
D．revitalized
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