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    29．Until tens of years ago.most zoos in such a way-animals in one area and birds in another． A．were organized B．had organized C．will organize D．have been organized 【查看更多】

     

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    Until tens of years ago，most zoos _____ in such a way—animals in one area and birds in another．

    A．were organized           B．had organized     C．will organize      D．have been organized

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