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Passage One Questions 26 to 28 are based on the passage you have just heard

A．Sharp-eyed experts.
B．People who know little about this field.
C．Dealers who sell old books.
D．People who like collecting old books.

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Passage One Questions 26 to 28 are based on the passage you have just heard 您的浏览器不支持 audio 元素。