Forms 7a, 7b. Past Simple vs Past Continuous

For practicing:
https://www.perfect-english-grammar.com/past-simple-past-continuous-exercise-1.html;
https://www.perfect-english-grammar.com/past-simple-past-continuous-exercise-2.html;
https://www.englisch-hilfen.de/en/exercises/tenses/simple_past_progressive.htm;
https://www.ecenglish.com/learnenglish/lessons/past-simple-vs-past-continuous;
https://elt.oup.com/student/project3rdedition/level5/unit1/grammar/exercise1?cc=lt&selLanguage=en;
https://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex07;
https://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex08;
http://www.esl-lounge.com/student/grammar/2g50-past-simple-or-past-continuous-worksheet.php;
https://www.englishgrammar.org/simple-or-continuous-tense-exercise-2/.
QUIZ:
http://learnenglish.britishcouncil.org/grammar/beginner-to-pre-intermediate/past-continuous-and-past-simple.