ELTC Argentina

Present Simple vs. Present Continuous

http://www.ego4u.com/en/cram-up/grammar/simpre-prepro
http://www.englishexercises.org/makeagame/viewgame.asp?id=1438
http://www.englisch-hilfen.de/en/exercises/tenses/simple_present_progressive.htm
http://www.inglestotal.com/present-simple-and-present-continuous-diferencias-y-ejercicios/