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 save | B．saving | C．saved | D．Save |
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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．following | B．followed | C．follow | D．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 hunting | B．while hunting | | C．while he hunt | D．while hunted |
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In old days, books for blind people used paper ____ against metal wire to form letters.| A．to press | B．pressing | C．pressed | D．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 find | B．to be found | C．finding | D．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；senses | D．Exposing；a sense |
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