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1-Their
2-its
3-Their
4-his; their; their; them
5-your; them; your
6-his; her; him
7-His
8-his; them; his; them
9-our
10-my; it
11-your; it
12-it

1. They live in Cardiff.
2. The cat is sleeping on **its** cushion in front of the fire.
3. Mrs. Donaldson has got two children. **Their** house hasn't got a big garden.
4. Bill and **his** sister go to the same school. If the weather is fine **they** go on **their** bikes, but if it is raining **their** mother takes **them**.
5. George! Take **your** shoes. He always leaves **his** shoes away in the cupboard.
6. Tom wants to marry **her** girlfriend. He loves **her**, but she doesn't love **him**.
7. Walter is a businessman. **His** office is in the town centre.
8. Jim can't find **his** books. Put **them** on the table.
9. Helen and I are going to the cinema with **our** same friends.
10. Why are you using **my** pen? I need **it**.
11. Mark and Joe, **your** room is a mess! Clean **it** up immediately!
12. We're lost. We've got a map, but we don't understand **it**.