单项选择题

An attempt to rescue the American ______ ended in disaster when a helicopter crashed.

A．captives
B．hostages
C．convicts
D．hosts
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单项选择题
Low lighting and soft music ______ the atmosphere in the room.
A．enriched
B．verified
C．enhanced
D．classified
单项选择题
The young doctor runs a ______ himself. It is near the newly-built railway station.
A．clinic
B．cabinet
C．ward
D．medication
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