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- http://www.aprenderespanol.org/verbos/subjuntivo-presente.html
- http://www.indiana.edu/~call/ejercicios/imp_subjuntivo02.html
- http://www.quia.com/quiz/925721.html?AP_rand=1155407928
- http://www.123teachme.com/learn_spanish/exercises_present_subjunctive_1
- http://www.studyspanish.com/practice/subj4.htm
- http://www.studyspanish.com/practice/subj8.htm
- http://web.uvic.ca/hrd/span100/unit12/U12f.htm