Употребите притяжательные местоимения (my/ our/ your/ his/ her/ their/ its)
1) "Is that ... car" "No, I haven*t got a car."
2) I*m going to wash .... hair before I go to the concert.
3) "What are the children doing?" "They are doing ... homework"
4) It*s very cold today. Put on ...coat when you go out.
5) Oxford is famous for ... University.