It's a mon for young people to pay a New Year's visit to their elders.
A. sense
B. practice
C. rule
D. scene
网友回答
A. sense
(答案→)B. practice
C. rule
D. scene
解析：考查名词：A. sense感觉，意识，B. practice 练习，做法，C. rule规定，D. scene场景，句意：年轻人新年拜访老人这是惯例。Commom sense常识，mom practice惯例，选B。