I think it is more for the people who are not retaking AS, it gives an idea of what topics could come up for that section, but my teacher said it doesn't help too much. some of the questions will take part of the report so you read through that section and answer a question on a topic which might be slightly related to the text. It isn't really worth spending hours on going through it just pick out some topics you recognize and go over them, thats all i really know, sorry if it isn't that helpful!