课程目录：

├──01.Great landmarks (1_A).mp4  104.46M

├──02.Great landmarks (1_B).mp4  72.42M

├──03.Great landmarks (2_A).mp4  73.32M

├──04.Great landmarks (2_B).mp4  56.13M

├──05.All Kinds of Jobs （1／A）.mp4  72.52M

├──06.Jobs people do （1／B）.mp4  55.18M

├──07.Jobs people do （2／A）.mp4  72.31M

├──08.Jobs people do （2／B）.mp4  56.25M

├──09.Animals of the Coast （1／A）.mp4  77.25M

├──10.Animals of the Coast （1／B）.mp4  65.80M

├──11.Animals of the Coast （2／A）.mp4  96.23M

├──12.Animals of the Coast （2／B）.mp4  73.24M

├──13.Getting to Work（1／A）.mp4  90.55M

├──14.Getting to Work （1／B）.mp4  63.91M

├──15.Getting to Work （2_A）.mp4  72.71M

├──16.Getting to Work （2／B）.mp4  52.85M

├──17.Our Earth (1_A).mp4  75.39M

├──18.Our Earth (1_B).mp4  69.29M

├──19.Our Earth (2_A).mp4  57.14M

└──20.Our Earth (2_B).mp4  74.16M