课文U2 Reading time.mp3 课文U2 Start to read.mp3 U3 课文U3 A Let's learn.mp3 课文U3 A Let's talk.mp3 课文U3 B Let's learn.mp3 课文U3 B Let's talk.mp3 课文U3 Letters and sounds.mp3 课文U3 Reading time.mp3...