Unit 1 let's talk A
Unit 1 let's talk B
单词跟读
Unit 2 let's talk A
Unit 2 let's talk B
Unit 3 let's talk A
Unit 3 let's talk B
Unit 4 let's talk A
Unit 4 let's talk B
Unit 5 let's talk A
Unit 5 let's talk B
Unit 6 let's talk A
Unit 6 let's talk B
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