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So although Fleming discovered penicillin, it was over a decade someone else tur

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So although Fleming discovered penicillin, it was over a decade someone else tur

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

A．when

B．that

C．before

D．unless

 

试题答案

【答案】

C

【解析】略

 

标签：decadeoverwasturnedelse

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