Circle the correct word. 1. You must / mustn't / can't eat in the classroom. It's not allowed! 2. Students can't / have to / don't have to take the rubbish out. The cleaners will do it. 3. You mustn't / must / can't enter the building after 10 o'clock. The entrance is closed.

Let's analyze each sentence and choose the correct modal verb. 1. You mustn't eat in the classroom. It's not allowed! * *Mustn't* используется для выражения запрета. Так как в предложении сказано "It's not allowed!", *mustn't* является правильным выбором. 2. Students don't have to take the rubbish out. The cleaners will do it. * *Don't have to* означает отсутствие необходимости. Так как уборщики сделают это, студентам не нужно выносить мусор. 3. You mustn't enter the building after 10 o'clock. The entrance is closed. * *Mustn't* используется для выражения запрета. Так как вход закрыт, нельзя входить в здание.