GBC interviews will often cover the global issues and current events. These questions are very broad, so be sure to ask for clarification if you are not sure what your interviewer is asking. Having knowledge of current events will help a lot in answering these questions, especially about controversial leaders.
Your teacher is now going to ask your questions about international politics and economics. Try to show off your English and conclude with your opinion or solution. Knowledge of global economic issues and doing business internationally will help you here.