5. Choose the correct word. 1 You must/needn'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 needn't/must/can't enter the building after 10 o'clock. The entrance is closed.

Пошаговое решение:

• 1. You can't eat in the classroom. It's not allowed! (Используем 'can't' для выражения запрета.)
• 2. Students don't have to take the rubbish out. The cleaners will do it. (Используем 'don't have to', так как это необязательно.)
• 3. You can't enter the building after 10 o'clock. The entrance is closed. (Используем 'can't' для выражения запрета.)