department store D. Underline the correct item. 21. You must can't have a party in here. It's not allowed. 22. He must/mustn't park his car here. It's not allowed. 23. You must/con do your homework. That's the rule. 24. You must/vanara seatbelt when you're

21. You can't have a party in here. It's not allowed. (Нельзя устраивать вечеринку, это запрещено.)
22. He mustn't park his car here. It's not allowed. (Ему нельзя парковать здесь машину, это запрещено.)
23. You must do your homework. That's the rule. (Ты должен делать домашнее задание, это правило.)
24. You must wear a seatbelt when you're (Ты должен носить ремень безопасности, когда ты)

Ответ: can't, mustn't, must, must