Нужно выбрать правильный вариант и объяснить почему 1. you must/mustn't/can't eat in the classroom. it's not allowed 2. student's can't/have to/don't have to take the rubbish out. the cleaners will do it 3. yoy mustn't/must/can't enter the building after 10 o'clock. the entrance is closed 4. you can't/must/mustn't get permission to invite friends in your room 5.you can/can’t/must sit on the grass! you will destroy the flowers.