Ответ:
1 задание:
1. mustn't
2. must
3. must
4. mustn't
5. mustn't
2 задание:
1. must
2. mustn't
3. must
4. mustn't
5. mustn't
6. mustn't
7. must
3 задание:
1. She can't dance
2. He can't climb
3. I can't swim
4. A dog can't run
5. A bird can't sing
4 задание:
1. Can a Dolphin swim?
2. Can a bird fly?
3. Can a dog run?
4. Can a girl sing?
5. Can a boy dance?
Объяснение:
must - обязан
mustn't - обязан не делать..
can - можешь
can - не можешь
вопросительная форма can:
can + предмет + глагол ?