Reading 3. (No. 43~45)
https://www.youtube.com/watch?v=6KrZShKDvSo&list=PL6D-YTosvGYq8YexsOG53BGav1CD0t3aM&index=44
Reading 4. (No. 46~48)
https://www.youtube.com/watch?v=f7x9u5PzX4M&list=PL6D-YTosvGYq8YexsOG53BGav1CD0t3aM&index=45