
http://www.listen-to-english.com/index.php?cat=podcasts (click to get to link)
Make sure your research covers the article's understanding of its vocabulary, grammar (syntax: the rules for the formation of grammatical sentences - morphology: the patterns of word formation) and concepts found in it.
Don't forget to study "Passive Tenses", Unit 7, Lesson 1. They are found on both your text and work books.