1. My best friend's/ friends' cat is called Snow White. It's not a very good
name because only her / hers tail is white, but that's what Tina wanted to
call her.
2.A: Whose / Who's bikes are these? Can we borrow them for a while?
B: They're not our / ours. Ask those girls. I think the bikes are their / theirs.
Friend's
her
2.who's
our
theirs
2) whose, ours, theirs