单项选择题

All human beings have a comfortable zone regulating the （） they keep from someone they talk with.

A．distance
B．scope
C．range
D．boundary

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单项选择题
The police are trying to find out the（）of the woman killed in the traffic accident.

A．evidence
B．recognition
C．status
D．identity
单项选择题
Anna was reading a piece of science fiction, completely （） to the outside world.

A．having been lost
B．to be lost
C．losing
D．lost
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