Why a 9th grade high school student doesn’t take a 7th grade test

(1)Exploring the 2017 Era
(2)Part 3. I want to be normal
(3)Kim Sungjin 26
(4)Korea University’s 9th-grade local government official has passed
(5)I think I heard it 150 times
(6)I shared it from last year until a few days ago