Listening 9. (No. 25~26)
https://www.youtube.com/watch?v=koijlPVZSAE&list=PL6D-YTosvGYq8YexsOG53BGav1CD0t3aM&index=39
Listening 10. (No. 27~28)
https://www.youtube.com/watch?v=ld5G-y93dHM&list=PL6D-YTosvGYq8YexsOG53BGav1CD0t3aM&index=40