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【题目】This medicine ________ millions of people's lives since then.

A.is savingB.will saveC.has savedD.had saved

【答案】C

【解析】

句意:从那以后这种药拯救了上百万人的性命。

考查时态辨析。is saving现在进行时;will save一般将来时;has saved现在完成时;had saved过去完成时。根据句意和句中的时间状语since then可知,这句话应用现在完成时态。故选C

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