Make sure you learn this core vocabulary thoroughly
Make sure you complete the tasks conscientiously by listening to the recordings only at first. If necessary, you can then later access the transcripts to check your answers or to practice reading along with the sound file to improve your pronunciation, intonation and spoken delivery.
Have a look at some of these recent news articles / videos to make sure you are up to date with the latest developments within this topic. Make a note of any new vocabulary you come across.
Each PDF has a link to the original article / video. You can explore further from there.