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    Glad to see you back. How long in Russia? A.did you stay B.have you stayed C.were you staying D.have you been staying ●案例探究 【查看更多】

     

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    Glad to see you back. How long _______ in Russia?

    A. did you stay  B. have you stayed

    C. were you staying  D. have you been staying

     

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    Glad to see you back. How long _____ in Russia?
    [     ]
    A. did you stay
    B. have you stayed
    C. were you staying
    D. have you been staying

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    Glad to see you back. How long    in Russia?

    A. did you stay  B. have you stayed  C. were you staying  D. have you been staying

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    Glad to see you back. How long __ in Russia?

    A. did you stay  B. have you stayed  C. were you staying  D. have you been staying

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    Glad to see you back. How long    in Russia?

    A. did you stay  B. have you stayed  C. were you staying  D. have you been staying

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