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    If only I how to operate a computer as you do! A. had known b. would know C. should know D. knew 【查看更多】

     

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    If only I ________ how to operate a computer as you do!

    [　　]

    A．had known
    B．would know
    C．should know
    D．knew

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    . If only I ________ how to operate an electronic computer as you do.

    A. had known                                              B. would know    

    C. should know                                            D. knew

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    If only I _____ how to operate an electronic computer as you do.

    A. had known            B. would know        C. should know           D. knew

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    If only I _____ how to operate an electronic computer as you do.

    A. had known                B. would know           C. should know              D. knew

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    If only I _____ how to operate an electronic computer as you do.
    A. had known 　　 B. would know 　　　 C. should know 　　　　 D. knew

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