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    What a pity! I hear they the tickets for the concert. A. have sold out B. are selling out C. sold out D. had sold out 【查看更多】

     

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    What a pity! I hear they _______ the tickets for the concert.
    [     ]
    A. have sold out  
    B. are selling out  
    C. sold out        
    D. had sold out

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