单项选择题
A.11 and under. B.12 and under. C.12 and over. D.18 and over.
A.A passenger who has traveled several times by plane. B.A passenger who wants to travel on any airlines flight. C.A passenger who has traveled on Shanghai Airlines flights. D.A passenger who has accumulated enough air miles on SAL flights.
A.Shanghai Airport. B.Shanghai Airlines. C.Shenzhen Airport. D.South Airlines.