Iii. put in the right form of pronoun. don't take … (my/mine) pen! take … (your/yours)! what was … (your/yours) mother doing? … farm is as rich as … (our/ours/their/theirs). this office is … (their/theirs). those are victor's books. the books are … (mine/his/hers).
2)Your
3)Our,theirs
4) his(точно не уверена)