Ответ:

1) My aunt isn't a nurse. She is an architect. These books are hers.

2) Jackie is from Australia. She is fourteen years old. Her favourite singer is Justin Bieber.

3) The young men aren't from Turkey. They are from Greece.

4) We are English. Our favourite actor is Benedict Cumberbatch. He is great.

5) Oleg's from Russia. He is fifteen years old. His favourite sport is tennis. This ball is his.

6) Peter and Lucy are fourteen years old. They are from England. Their favourite subject is maths. These calculators are theirs.

Ответ: 1) She, hers; 2) She, Her; 3) They; 4) We, Our, He; 5) He, His, his; 6) They, Their, theirs.