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听力原文: A fire broke out in a Buenos Aires nightclub, which packed with young revelers celebrating the New Year holidays. It killed at least 175 people when a crowd was trapped by locked doors, officials said on Friday. At least 619 people were injured in the blaze, after a flare fired into the club's ceiling during a rock concert. The blaze may have claimed more victims because four of the club's six doors were inexplicably tied shut with wire. Which is the most possible reason for such a disaster?