Prepare some questions to ask at the end of the interview
It’s perfectly ok to note down your questions and take them in with you for reference. Having a notepad will also allow you to take notes during the interview if you need to.
If they happen to answer your questions throughout the course of the interview, you can show them that you did have some questions prepared.
Think about questions that show you’re really thinking about being in the position. The only questions to avoid are anything related to the salary or benefits, as you don’t want it to come across that this is all you’re interested in!