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    Only when we saw the photos about the air crash how terrible it was. A had we known B we had known C did we know D we knew 【查看更多】

     

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    Only when we saw the photos about the air crash ________ how terrible it was.
    [     ]
    A. had we known  
    B. we had known
    C. did we know  
    D. we knew

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    Only when we saw the photos about the air crash ________ how terrible it was.
    [     ]
    A. had we known  
    B. we had known
    C. did we know  
    D. we knew

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    Only when we saw the photos about the air crash_____ how terrible it was.

    A had we known      B we had known     C did we know     D we knew

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     Only when we saw the photos about the air crash ______ how terrible it was.

    A.      we knew      B .we had known   C. did we know    D. had we known

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    Only when we saw the photos about the air crash_____ how terrible it was.
    A had we known      B we had known    C did we know     D we knew

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