听力(第四册)(超越概念——高等院校英语专业系列教材)附赠光盘

unit 1 learning a foreign language
unit 2 pop music
unit 3 higher education
unit 4 economy
unit 5 war and conflicts
unit 6 politics
unit 7 digital technology
unit 8 energy crisis
unit 9 natural disasters
unit 10 environmental protection
unit 11 internet and other addictions
unit 12 colorful cultures
unit 13 discoveries
unit 14 arts and literature
unit 15 social interactions