Задание 2
1) Yes, she did.
2) Yes, it is.
3) Yes, they are.
4) Yes, she does.
5) Yes, they do.
Задание 3
1) They haven't got a kitten.
2) I am not at home (не употребляется сокращенно)
3) He isn't a dentist.
4) They can't dance.
5) They aren't from Africa.