PAST SIMPLE AND PAST CONTINUOUS

PARA REPASAR ONLINE
http://www.perfect-english-grammar.com/past-simple-past-continuous-exercise-1.html
http://www.perfect-english-grammar.com/past-simple-past-continuous-exercise-2.html 

http://www.aulafacil.com/cursos/l22536/idiomas/ingles/ingles-repaso-de-gramatica/ejercicios-past-simple-vs-past-continuous