https://test-english.com/grammar-points/a2/past-continuous-past-simple/

https://www.perfect-english-grammar.com/past-simple-past-continuous-exercise

https://www.liveworksheets.com/worksheet/en/english-second-language-esl/422250

https://www.liveworksheets.com/worksheet/en/english-language/54076

https://www.liveworksheets.com/worksheet/en/english-language/1753146