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    Mr. Green is said an experiment to prove the new method of solving the problem when young. A. to do B. to have done C. to be doing D. to have been doing 【查看更多】

     

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    Mr. Green is said _____ an experiment to prove the new method of solving the problem when young.

    　　A. to do            B. to have done       C. to be doing        D. to have been doing

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    Mr. Green is said _____ an experiment to prove the new method of solving the problem when young.

    　　A. to do            B. to have done       C. to be doing        D. to have been doing

    查看答案和解析>>

    Mr. Green is said _____ an experiment to prove the new method of solving the problem when young.

    A. to do            B. to have done　　　 C. to be doing     　 D. to have been doing

     

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    Mr. Green is said _____ an experiment to prove the new method of solving　the problem when young.

        A. to do                      B. to have done

        C. to be doing                D. to have been doing

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    Mr. Green is said _____ an experiment to prove the new method of solving　the problem when young.

    　　A. to do            B. to have done

    　　C. to be doing      D. to have been doing

    查看答案和解析>>


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