1) they know ours/our address but they don't know their/theirs
2) my/mine room is bigger than her/hers but her/hers is nicer
3) I can see your/yours children at the school gate but where are my/mine?
4 )I want to change my/mine computer. i want to buy one like yours/ your
5) It's their/theirs question, not our/ ours
6) are these your/ yours shoes
ĐÁP ÁN: IN ĐẬM