TAREA DE DESEMPEÑO

References:

 Commans in a series.  (2013).  Recuperado de http://www.k12reader.com/worksheet/commas-
      in-a-series/

Using apostrophes to Show Possession.  (2013).   Recuperado de http://fileserver.net-texts.com
     /asset.aspx?dl=no&id=11551