
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 "making deductions and speculating about the past", Unit 5, Lesson 3. They are found on both your text and work books.