The new treatments ______by Norman Bethune helped a number of soldiers


  1. A.
    invent
  2. B.
    invents
  3. C.
    inventing
  4. D.
    invented
D
考查分詞用法。句意為“由白求恩發(fā)明的新的治療方法幫助了很多的士兵。”invented為過去分詞作后置定語。故選D。
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