for this exercises you have to ask you to know how to solve, for example:
Mi novia trajo mi pasaporte. The subject is Mi novia, and you must to do this question:
What is the thing that my girlfriend gave me?? the passport, the passport is the object
passport is a male name and singular... you must use the pronoun LO
My girlfriend gave me the passport... Gave to ME!! so you must use ME
Mi novia ME LO trajo.
first the person, second the pronoun.
Try to do this with the other phrases and contact with me if you have asks.