Audition for Ruth in Pirates of Penzance! Help!?

I have an audition for Pirates of Penzance in August! I've decided to go for the role of Ruth, because even though I can hit Mabel's notes, me being an upcoming sophomore, I feel like the seniors who are more classically trained will beat me out, so I decided to go for Ruth, who is probably more fun character and costume wise anyways. For the audition I need 16-bars of a musical theatre songs (preferably operatic in style) and a 1-minutes classical/comedic monologue. My the song, I'm thinking about doing "Alone and Yet Alive" from The Mikado because it's by the same writers and the role is also a contralto, the same as Ruth. For the monologue, I'm am very confused about what I should do. I'm thinking something from another G&S operetta, but I haven't found any that are comical. I'd really appreciate suggestions on what do for the monologue. And it can't be anything from Pirates of Penzance.I have an entire book on classical women's monologue, but I didn't find anything in there either. Thanks for the suggestions!