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    They have made so great progress . A. three years ago B. for three years C. in the past three years D. before three years 【查看更多】

     

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    They have made so great progress      .

                    A. three years ago                                             B. for three years

                    C. in the past three years                                D. before three years

     

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    They have made so great progress      .

                    A. three years ago                                             B. for three years

                    C. in the past three years                                D. before three years

     

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    They have made so great progress            .
    [     ]
    A. three years ago
    B. for three years
    C. in the past three years
    D. before three years

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