You have "My [subject]" as an answer to a lot of these when just "The [subject]" should be acceptable.
in one sentence "MY" brother is not important, because it is not necessary that it is my brother and in this sentence "MY" wife is important..
Why is it "my" wife? Why not "his" wife? In Czech is it assumed to be "my wife" unless "jeho" is specified?
Something like that.