Task 3. Fill in the gaps with must or mustn’t
1. You … eat inside the gallery.

2. You … be quite in the library.

3. We … feed the animals at the zoo. It is very dangerous.

4. We … take pictures. It is bad for the paintings.
5. You … leave by 6 o’clock or You’ll be late.

6. You … interrupt your teacher when she is speaking.
Дам 45 баллов

Ответ:

1. Must eat
2. Must be quite
3. Mustn't feed the animals
4. Mustn't take
5. Must leave
6. Mustn't interrupt.