单项选择题
As soon as a student gains their_________ they instantly become a Dan Grade and receive their 1st Dan black belt.
A、black belt
B、blue belt
C、
yellow belt
D、green belt
As soon as a student gains their_________ they instantly become a Dan Grade and receive their 1st Dan black belt.
A、black belt
B、blue belt
C、
yellow belt
D、green belt