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    When flint to the market, these products enjoyed great success. A. introducing B. introduced C. introduce D. being introduced 【查看更多】

     

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    When flint _______  to the market, these products enjoyed great success.

       A. introducing             B. introduced

       C. introduce                D. being introduced

     

     

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    When flint _______  to the market, these products enjoyed great success.

    A. introducing                            B. introduced

    C. introduce                             D. being introduced

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    When flint _____________ to the market, these products enjoyed great success.

    A. introducing 　　　　　　　　　　 　　　　　　  　　   B.introduced

    C. introduce    　　　　　　　　　　 　　　　　　  　　   D.being introduced

     

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    When flint _____________ to the market, these products enjoyed great success.

    A. introducing 　　　　　　　　　　 　　　　　　  　　   B.introduced

    C. introduce    　　　　　　　　　　 　　　　　　  　　   D.being introduced

     

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    When flint 　　 to the market,these products enjoyed great success.?

    A.introducing　　　　B.introduced　?

    C.introduce　　　　　D.being introduced?

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