F 7 Past continuous

http://www.perfect-english-grammar.com/past-continuous-exercise-1.html
http://mrbrownslearningspace.com/wp-content/uploads/2015/01/Past_Progressive_1.htm
http://www.eslgamesplus.com/past-progressive-past-continuous-past-simple-verb-tenses-esl-grammar-interactive-activity/
https://www.englisch-hilfen.de/en/exercises/tenses/simple_past_progressive.htm