011 Unit Eleven-Dealing with World Poverty and Starvation.MP3
012 Unit Twelve-Space Exploration.MP3
013 Unit Thirteen-Urbanization.MP3
014 Unit Fourteen-Crime and Punishment.MP3
016 Unit Sixteen-People and Population.MP3
015 Unit Fifteen-Advertising and Media.MP3
006 Unit Six-Health Problems.MP3
007 Unit Seven-Harmony with Nature.MP3
008 Unit Eight-Computer and Internet.MP3
009 Unit Nine-Fighting Against Disease.MP3
010 Unit Ten-Global Economy and Finance.MP3
001 Unit One-How to be a Good English Learner.MP3
002 Unit Two-School and Education.MP3
003 Unit Three-Jobs and Professions.MP3