u2-again,please.mp3
u2-单词.mp3
u2_lesson07-My Friend.mp3
u2_lesson08-Letters.mp3
u2_lesson09-Open and Close.mp3
u2_lesson10-Red,Yellow,Blue,Green.mp3
u2_lesson11-Orange,Brown,White,Black.mp3
u2_lesson12-More Letters.mp3
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