OUr teacher is very strict with this and hasn't told us a thing. However, when i was speaking to her today about the possibility that they may join two parts of the syllabus to one question (say "examine urban dynamics in relation to the nature and spatial distribution of world cities") and she told me they may in the HSC, but the trial one's will be "just simple questions." So i got the feeling that they essay questions will be simple questions taken from the syllabus