Listening 1.(No. 1~3)
https://www.youtube.com/watch?v=0FGhgjoBSzU&list=PL6D-YTosvGYq8YexsOG53BGav1CD0t3aM&index=14
Listening 2. (No. 4~8)
https://www.youtube.com/watch?v=EmnI5Ldg-7k&list=PL6D-YTosvGYq8YexsOG53BGav1CD0t3aM&index=15