№ 2 Complete the sentences using appropriate possessive pronouns 1. We're going swimming with some friends of (me/mine). 2. It's (theirs/their) problem, not (our/ours). 3. Is it (yours/your) scientific article about spiders? -No, it's not (my/mine). 4. That's not (my/mine) wallet. (Mine/my) is black. 5. - Whose sunglasses are these? - They're Amy's, I think. - Yes, they're (her/hers). 6. We can believe them. (Their/theirs) experiment is a good proof for us.