Download the script here.
There are tons of amazing exchanges among the leads and the entire script is worth a read, but if you’re looking for some of those roles that would have been auditioned try these:
GERTA the lawyer – scene 53, scene 58b for the reaction and scene 60 (the beginning and end).
BLEEKER’S MOM – a dowdy lady, scene 46 and 71 for the dialogue and the ‘look’.
ULTRASOUND TECHNICIAN – scene 63 – a lovely scene for any actor
MAC – Juno’s dad, okay maybe not strictly an ‘auditioned for’ role but why not try scene 96.
Good luck with your learning.