SIMPLE PAST EXERCISES

http://www.myenglishpages.com/site_php_files/grammar-exercise-simple-past.php
https://www.ego4u.com/en/cram-up/grammar/simple-past/exercises
http://www.englisch-hilfen.de/en/exercises/tenses/simple_past_mix.htm
http://www.perfect-english-grammar.com/past-simple-exercise-7.html
http://www.grammarbank.com/simple-past-irregular-verbs.html
http://www.really-learn-english.com/simple-past-exercises.html