================================================ 压缩包内容： Unit1 PB Let’s check.mp3 Unit1 C Story time.mp3 Unit1 PA Let’d do.mp3 Unit1 PA Let’s learn.mp3 Unit1 PA Let’s spell.mp3 Unit1 PA Let’s talk.mp3 Unit1 PB Let’s learn.mp3 Unit1 PB Let’s sing.mp3 Unit1 PB Let’s talk.mp3 Unit1 PB Read and write.mp3 Useful expressions in Unit1.mp3 Words in Unit1.mp3
