Ответ: must: 1); 2); 3) . Mustn’t: 4); 5); 6); 7); 8)
Объяснение:
You 1) must to be on time.
You 2) must leave your outfit at the cloak room.
All the electronics 3) must be switched off till the
end of the performance.
You 4) mustn’t talk during the performance.
You 5) mustn’t put your feet on your seat.
You 6) mustn’t clap at the appropriate time.
You 7) mustn’t drop rubbish on the floor.
You 8) mustn’t leave your seat until the performance
ends.