单项选择题

When people have got to the ground floor, they should______.

A．gather in the hall
B．gather behind the building
C．go to any place they like
D．all be in the square outside the building
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单项选择题
A fire drill is______.
A．a real fire
B．to drill for fire
C．to put out fire
D．to prepare people for a real fire
单项选择题
The people spoken to are______.
A．the people living in the building
B．school children
C．patients
D．firemen
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