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    The book was written in 1946, the education system has witnessed great changes. A. since when B. after which C. since then D. during which 【查看更多】

     

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    The book was written in 1946, _____ the education system has witnessed great changes.

    A．whenB．during whichC．since whenD．since then

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    The book was written in 1946, _______ the education system has witnessed great changes.

    A．since thenB．whenC．since whenD．during which

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    The book was written in 1946, _______ the education system has witnessed great changes.

    A．since then         B．when             C．since when        D．during which

     

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    The book was written in 1946, _____ the education system has witnessed great changes.

      A. when                B. during which      C. since when         D. since then

     

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    The book was written in 1946, ____ the education system has witnessed great changes.

    A．when

    B．during which

    C．since then

    D．since when

     

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