jueves, 30 de julio de 2009

pedagogical artifacts

PAGES:

http://www.ego4u.com/en/cram-up/grammar/simple-present/form/exercises
http://www.isabelperez.com/happy/tenses/present_simple.htm
http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/simcon1.htm

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