请选择ABC/N;S6X)U'}5q2`;L)f,g5G*^/p5\ －Good afternoon，class. － , teacher./I9O1Q3q.M*N+_3Z9W5m2`:X8n
A. Good morning/I9O1Q3q.M*N+_3Z9W5m2`:X8n
B. Good afternoon/I9O1Q3q.M*N+_3Z9W5m2`:X8n
C. Goodbye/I9O1Q3q.M*N+_3Z9W5m2`:X8n