um to get three marks i reckon you would have to mention more than 3 points. i dont think the words 'strewth' and 'fair dinkum' were there for humour either - more to do with giving an authenticity to the story i.e its AUSTRALIAN!
I think instead of stressing yourselves out about something you cant change you should study for your other papers and remain positive! You can always make up for silly mistakes on Wednesday!
Good Luck all.