If possible, read the play. If not, at least look up the synopsis of the play and information about the characters.
See the "Audition Resources" page for audition sides and application. Choose one to prepare (no, you don't have to have it memorized this time.)
You should have the monologue memorized. The most important thing to show is that you can act, which is hard to do with a script in your hand.
All I ask is that you try your hardest.