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There______ a number of natural mysteries in the world that even make scientists ______


  1. A.
    exists; confusing
  2. B.
    are existed; confused
  3. C.
    exist; confused
  4. D.
    exist; confusing
C
考查固定句型和形容词辨析。There exist...表示“存在、有......”,排除B;exist的单复数要根据后面的名词来定。根据mysteries可知,应该用复数,即原形,排除A;confused“迷惑的”,修饰人;confusing“令人迷惑的”,修饰物。这里修饰的是scientists。故选C。
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