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詞辨析。There exist...表示“存在、有......”，排除B；exist的單復(fù)數(shù)要根據(jù)后面的名詞來定。根據(jù)mysteries可知，應(yīng)該用復(fù)數(shù)，即原形，排除A；confused“迷惑的”，修飾人；confusing“令人迷惑的”，修飾物。這里修飾的是scientists。故選C。
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