Listening 1. (No. 1~4)
https://www.youtube.com/watch?v=jJifiUoBZXE&list=PL6D-YTosvGYq8YexsOG53BGav1CD0t3aM&index=31
Listening 2. (No. 5~6)
https://www.youtube.com/watch?v=QwYGuYEP0-k&list=PL6D-YTosvGYq8YexsOG53BGav1CD0t3aM&index=32