CAM 15 Sách + File nghe

 SÁCH: https://drive.google.com/file/d/1ChJ3cxe2NwocBOzCUYha3f4SCFK4iCkD/view?usp=sharing

FILE NGHE: https://drive.google.com/drive/folders/1rt54Pc1sQVsF26Q8fPe5EJ0aOV3GzvdA?usp=sharing