CAN/ MUST

https://www.usingenglish.com/quizzes/401.html

https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-2157.php


https://elt.oup.com/student/newhotline/grammar/start10.1?cc=global&selLanguage=en


https://www.englisch-hilfen.de/en/exercises/modals/must_not.htm