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Lesson 1{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-01.mp3{/audio}
Lesson 2{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-02.mp3{/audio}
Lesson 3{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-03.mp3{/audio}
Lesson 4{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-04.mp3{/audio}
Lesson 5{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-05.mp3{/audio}
Lesson 6{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-06.mp3{/audio}
Lesson 7{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-07.mp3{/audio}
Lesson 8{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-08.mp3{/audio}
Lesson 9{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-09.mp3{/audio}
Lesson 10{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-10.mp3{/audio}
Lesson 11{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-11.mp3{/audio}
Lesson 12{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-12.mp3{/audio}
Lesson 13{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-13.mp3{/audio}
Lesson 14{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-14.mp3{/audio}
Lesson 15{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-15.mp3{/audio}
Lesson 16{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-16.mp3{/audio}
Lesson 17{audio}listening/audio/toeflibt/buildingskills/chapter4/Building_IBT_LC_4_Track-17.mp3{/audio}