Is there a reason why I cannot use "this" instead of "it"? This is your book answer is not accepted and it requires It is your book. thanks!
I had to translate into English so jouw was already written down for me. But absolutely you could. Like so many languages it's all about relationships. Familiarity, addressing children, friends, family members and animals or respect addressing strangers or older people in respected positions (don't mean to ramble on if you already know this :) ). But if you have to translate the Emglish sentence into Dutch then uw should be accepted as it is out of context