5º: Unit 7: Imperatives

 https://english.lingolia.com/en/grammar/verbs/imperative/exercises

https://test-english.com/grammar-points/a1/imperative-sit-dont-talk/  (there are 3 exercises. Click on the numbers on the top right corner)

https://learnenglishkids.britishcouncil.org/grammar-vocabulary/grammar-practice/imperatives   (explanation and two games)

https://www.englisch-hilfen.de/en/exercises/various/imperative.htm