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    34． How long is it we last had a picnic together? A. until B. before that D. since 【查看更多】

     

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     How long is it ________________ we last had a picnic together?

    A. until            B. before        C.that             D. Since

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    How long is it _______we last had a picnic together?

    A. until        B. before        C. that           D. since

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    How long is it ________________ we last had a picnic together?

    A．until

    B．before

    C．that

    D．Since

     

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    How long is it ________ we last had a picnic together?

             A．until   B．before                C．that   D．since

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    How long is it ________ we last had a picnic together?

    A．until          B．before               C．that           D．since

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