What does 'in-flight service' (Line 1, Para, 5) mean?
A.Service on the planE.
B.A new safety devicE.
C.Flights within one country.
D.Charge-free air servicE.

A.Service
B.
B.A
C.
C.Flights
D.
D.Charge-free

【参考答案】

A
解析：语义题，结合上下文可知，in-flight service 意为“飞机上的服务”，所以A正确