17. Choose the correct word. 2. Is this your parents' house? — No, it isn't. Their/Theirs has got 2 floors. 3. Is that car your/yours? — No, it isn't my/mine. My/Mine car is black. 4. Whose basketball is this? — It's our/ours. 6. Where is it/its bowl? — It's/Its on the floor. 7. Who is she/her? — She is his/her niece. 8. Is that their/theirs snowboard? — No, it isn't their/theirs.

Правильный вариант выбирается по правилу: перед существительным употребляется притяжательное прилагательное, а без существительного — притяжательное местоимение.

1. Is this your parents' house? — No, it isn't. Theirs has got 2 floors.
2. Is that car yours? — No, it isn't mine. My car is black.
3. Whose basketball is this? — It's ours.
4. Where is its bowl? — It's on the floor.
5. Who is she? — She is his niece.
6. Is that their snowboard? — No, it isn't theirs.