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        1. He realized his mistakes and took action to reduce the loss _________ it was too late.

          A.until B.when C.before D.a(chǎn)s 

          C

          解析試題分析:句意:他意識到自己的錯誤并且采取措施來盡可能地減少損失。before意為“在……之前”,即在太晚之前采取措施;故選C。
          考點:考查連詞。

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