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    22．The original painting has been replaced by a fake, and no one knows when the was made. A．switch B．action C．investigation D．breakthrough 【查看更多】

     

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    The original painting has been replaced by a fake, and no one knows when the ________ was made.

    A．switch 　　　 B．action 　　　 C．investigation 　 D．breakthrough

     

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