1) 예비중1 LEVEL 1
https://www.dropbox.com/scl/fi/edvch20prwq4qrx164fsq/1-Level1-2-9.MP4?rlkey=whf26d9z1fqgw3lqu06vvauub&st=ewhbhg1o&dl=0
2) 예비중1 LEVEL 2
https://www.dropbox.com/scl/fi/zx46eas4fktp02u2kpidj/1-Level2-2-9.MP4?rlkey=q6cpeqpshud2uj299k03eq333&st=btefrlol&dl=0