Questions 11 to 18 are based on the conversation you have just heard.

A．He should sit in the smoking section.

B．He should ask the stewardess for help.

C．He should move to another part of the plane.

D．He should extinguish his cigarette at once.

通过信息流线的信息，正常信息流方向：垂直流为自顶部至底部，水平流为自右至左。