【題目】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:從那以后這種藥拯救了上百萬(wàn)人的性命。

考查時(shí)態(tài)辨析。is saving現(xiàn)在進(jìn)行時(shí);will save一般將來(lái)時(shí);has saved現(xiàn)在完成時(shí);had saved過(guò)去完成時(shí)。根據(jù)句意和句中的時(shí)間狀語(yǔ)since then可知,這句話應(yīng)用現(xiàn)在完成時(shí)態(tài)。故選C

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