Basically know yourself and your story. This includes things like why do you want an MBA, why do you want an MBA right now, why do you want to go to X school, talk about your current job, talk about short-term and long-term goals.
Do U think that they will look at our CV and ask in detail about it?
Have they ever checked our knowledge of finance and economics (says asking smt related to these topics).
What we should show them at the interview? Just a fluent English, confidence or an interesting life-story