As we know, penicillin became the greatest drug of the 20th century, ______ millions of lives.A.to saveB.savingC.savedD.Save
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B解析考查非谓语动词。根据句子结构可知， ______ millions of lives作伴随状语，save和它的逻辑主语penicililin之间是主动关系，故采用saving形式，to save表目的 ，saved表被动 save用于祈使句