EJERCICIOS DE REPASO DO Y DOES

EXPLANATION http://www.clafoti.com/Imagenes/PreSimple_interr.htm
ACTIVITY 1 http://www.englisch-hilfen.de/en/exercises/tenses/do_does2.htm
ACTIVITY 2 http://www.members.iinet.net.au/~adelegc/grammar/present_simple/pres_sim_quests1.html