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We believe scientists will ________ a way to solve the problem of air pollution.


  1. A.
    set off
  2. B.
    put off
  3. C.
    come up with
  4. D.
    catch up with
C
本题考查具体语境中动词短语的辨异.A项意为“动身,使某人开始做某事”;B项意思是“延期,推托,阻止”;C项意为“赶上,找到,提出”;D项意为“赶上”.结合句意“我们相信科学家会找到解决问题的方法”,所以选择C.
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