PAST SIMPLE

http://www.ego4u.com/en/cram-up/grammar/simple-past

http://www.myenglishpages.com/site_php_files/grammar-exercise-simple-past.php#.UvfTdvZhwmU

http://www.practicaingles.es/exercises-and-theory/grammar-exercises-and-theory/past-simple/

http://www.englisch-hilfen.de/en/exercises/questions/simple_past2.htm

 http://www.ejerciciodeingles.com/ejercicios-past-simple-rellenar-huecos/