1. The students mustn't forget their homework.
2. I mustn't cross this bridge. It's closed.
3. It's late. You needn't make so much noise.
Объяснение:
1. The students mustn't forget their homework.
2. I mustn't cross this bridge. It's closed.
3. It's late. You needn't make so much noise.
Объяснение: