whiskybravo, I understand from your previous posts that you live in China with a China ATPL but only an Aussie CPL. Normally an Aussie CPL will have to sit all 7 Aussie ATPL subjects, but if you have a China (ICAO) ATPL, you only need to sit the Air Law paper out of the 7 ATPL exams.
Civil Aviation Safety Authority - Overseas Licence Conversion Examinations
However, the catch is you need IREX and an Aussie MECIR to be issued an Aussie ATPL. CASA publishes sample IREX questions but not answers:
Civil Aviation Safety Authority - IREX Sample Examination Questions
I am not aware of free Aussie ATPL/IREX question papers on the internet. CASA does not publish its actual question bank like FAA (on which CAAC questions are based). AvFacts and Aviation Theory Centre have textbooks for sale and AFT conducts both full-time and distance learning courses.