Question

Lucas found some old things in the attic. Say to whom they belong by rewriting the phrases. Use the correct possessive adjective for each. unas revistas viejas de nosotros how would i write this

Answer 1

Some of our old magazines. 
That is how it would be translated into English. But if you want a direct translation, instead of how you would actually say it in English it would be: Some magazines of ours.
Your teacher is looking for the first one though.