https://agendaweb.org/verbs/past_simple-exercises.html
https://agendaweb.org/verbs/past-simple-affirmative-exercises.html
https://agendaweb.org/verbs/to-be-past-exercises.html
https://agendaweb.org/verbs/past-simple-affirmative-exercises.html
https://agendaweb.org/verbs/to-be-past-exercises.html