This week we've studied obligation and prohibition with must/mustn't/have to/don't have to/should.
Grammar revision
https://test-english.com/grammar-points/b1/have-to-must-should/
https://www.englishexercises.org/makeagame/viewgame.asp?id=2786
http://digitalcampus.free.fr/Level2/Unit24/SubUnit243/MCQ01.jqz.htm
https://www.esl-lounge.com/student/grammar/2g9-mustnt-dont-have-to-difference.php
http://mrsc.free.fr/4LV1-4-oblig-interdict.htm
https://www.esl-lounge.com/student/grammar/2g8-must-have-to-difference.php