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    that this region was so rich in natural resources. A. Little he knew B. Little did he know C. Little he did know D. Little he had known 【查看更多】

     

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    ________ that this region was so rich in natural resources．

    [　　]

    A．Little he knew

    B．Little did he know

    C．Little he did know

    D．Little he had known

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