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    It was over a decade someone else turned penicillin into the great drug of the 20th century. A. since B. after C. that D. before 【查看更多】

     

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    It was over a decade _______ someone else turned penicillin into the great drug of the 20th century.

    A. before            B. that             C. which                D. after

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    So although Fleming discovered penicillin, it was over a decade ___________someone else turned penicillin into the great drug of the 20th century.

    A．when

    B．that

    C．before

    D．unless

     

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    So although Fleming discovered penicillin, it was over a decade ___________someone else turned penicillin into the great drug of the 20th century


    1. A.
      when
    2. B.
      that
    3. C.
      before
    4. D.
      unless

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    So although Fleming discovered penicillin, it was over a decade ___________someone else turned penicillin into the great drug of the 20th century.

       A. when           B. that              C. before             D. unless

    查看答案和解析>>

    So although Fleming discovered penicillin, it was over a decade ___________someone else turned penicillin into the great drug of the 20th century.

    A．when         B．that            C．before          D．unless

    查看答案和解析>>


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