Have a good read through the job description and highlight any keywords such as teamwork etc as these type of questions may well come up at interview.
You could then make a list of questions using the keywords and other common questions they may ask. Get someone to practice with getting them to ask you the questions. You'll be much less likely to dry up then at the actual interview itself.
Make sure you've got a question or two at the end of the interview as most of the time you are always asked if you have any questions so it's always a good idea to think of something to ask beforehand.