You and student B take turns to give long speeches. You get two colour photos. You have to talk about them on your own for a minute. When you finish, the examiner asks the other student (student B) a question about your photos - student B should talk for about 30 seconds.
Then student B gets two photos and has to talk about them for one minute. When that is over, the examiner asks you a question, and now you have about 30 seconds to answer.