Luyện nghe nói - Mastering the American Accent
Unit 141 : Native Language Guide - Korean

STT	Tên task	Số câu hỏi	Audio
1	Consonants	1	No audio
2	Vowels	1	No audio
3	Syllable Stress	1	No audio
4	Word Stress	1	No audio

Unit 140 : Native Language Guide - Japanese

Unit 142 : Native Language Guide - Portuguese