单项选择题

A．They are more likely to damage the cave.
B．It’s hard for them ’to stay awake.
C．They tend to break their equipment.
D．They may imagine seeing things that aren’t really there.
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单项选择题
A．Officials from the New York Police Department.B．Officials from the New York federal government.C．Officials from the New York local government.D．Americans working in subway and restaurants.
A．Officials from the New York Police Department.
B．Officials from the New York federal government.
C．Officials from the New York local government.
D．Americans working in subway and restaurants.
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