To start with pronunciation practice, I want you to watch this video and get some tips to help you with your pronunciation skills. It's obvious that we are not native speakers, but you can improve your pronunciation by listening to the news in English or watching original version films. Here I give you a website link where you will find information and activities to practise. Remember that in your University entry exam there will be one question related to pronunciation (1 point) where you will have an odd-one-out activity.
Website for pronunciation: http://www.bbc.co.uk/worldservice/learningenglish/grammar/pron/
PHONETIC CHART
Become familiar with the different sounds.
http://www.pearsonlongman.com/phonetic-chart.html