the boy's books are on the sofa.对the boy's进行提问
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theboy''sbooksareonthesofa.对theboy''s进行提问theboy''sbooksareonthesofa.对theboy''s进行提问theboy''sbooksareonthes
the boy's books are on the sofa.对the boy's进行提问
the boy's books are on the sofa.对the boy's进行提问
the boy's books are on the sofa.对the boy's进行提问
Whose books are on the sofa?