Some questions will give you a prefix, suffix or combining form. Other questions will be the definition and you will need to select the appropriate prefix, suffix or combining form. Then there are many that are only a single word which is misspelled and you will need to spell it correctly.
*EDITED* - Needed to edit due to not having the audios available for the audio questions any longer. Those questions that were audio related have been deleted and the quiz stats have been reset to zero as of May 23, 2011.