Hi Javi. I'm a listening teacher, but I don't focus on exam listening unfortunately!

I've got a colleague (I don't think he's on iTalki though) who specialises in IELTS. There are a couple of articles on his site about the listening section of the IELTS, including this one on multiple choice questions. Hope it helps. http://www.totalielts.com/ielts-listening-multiple-choice/