If youve gone through the trouble of preparing answers to different questions, throw them away. Part of speaking fluently is speaking spontaneously, and the examiner will immediately know if youre regurgitating responses. This will drastically hinder your score as the examiner cannot count these as answers because they are nothing more than memorization. The key is to be relaxed, have fun using English and respond directly to the questions asked. Plus, theres nothing worse than trying to make a prepared answer fit a question that is just slightly different.