Form 6b. Past Simple

http://www.really-learn-english.com/simple-past-exercises.html;
http://www.grammarbank.com/simple-past-tense-exercises.html;
https://www.ego4u.com/en/cram-up/grammar/simple-past; https://www.ego4u.com/en/cram-up/grammar/simple-past/exercises.