As we know, penicillin became the greatest drug of the 20th century, ______ mill

As we know, penicillin became the greatest drug of the 20th century, ______ mill

题型:不详难度:来源:
As we know, penicillin became the greatest drug of the 20th century, ______ millions of lives.
A.to saveB.savingC.savedD.Save

答案
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
举一反三
I heard it was going to become cloudy this afternoon, ____ by a storm.
A.followingB.followedC.followD.to follow

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One winter day ____, he saw the tracks of animals in the snow and observed that the appearance of each one was different.
A.while he huntingB.while hunting
C.while he huntD.while hunted

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In old days, books for blind people used paper ____ against metal wire to form letters.
A.to pressB.pressingC.pressedD.which pressed

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—What’s the matter with Tim?
—Oh. Tim’s cell-phone was left in a taxi accidentally, never          again.
A.to findB.to be foundC.findingD.being found

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        to the sun,the flowers will become dry soon.
—What you said does make          .
A.Exposed;sense      B.Exposing;sense
C.Exposed;sensesD.Exposing;a sense

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