You have to be as per the book, not either what you think, what you have seen, what you would do, but the book.
Look at the post on here that says most at a meeting would give DOGSO-H for a pass back.....
think tricky ones like from a throw (OS / 7 things), a restart of play (who where), FK procedure and YC / RC actions etc.
Quite a few are the restart of play, and the things happening that you would not expect - from an IDFK in a defending half (outside the PA) they kick the ball direct into their own net. Is it A) retake, B) Goal, C) Corner, D) GK.
Goal scored from a Throw in.
Offside position when ball is played by a defender - still offside?
Pre and post match protocols - ball size, weight, team colours, inder garments ya de ya.