请选择DCBA1]']9n6Q ---How do you do? ---_____.)B9]:R*z1@9s.m2]
A. How old are you?)B9]:R*z1@9s.m2]
B. Fine, thanks.)B9]:R*z1@9s.m2]
C. How are you?)B9]:R*z1@9s.m2]
D. How do you do?)B9]:R*z1@9s.m2]