5. which of the following has helped the airline industry make profits?
(A) Drop in fuel prices.
(B) Raise in flight tickets.
(C) Competition among companies.
(D) Improved efficiency in the industry

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統計： A(154), B(70), C(82), D(379), E(0) #704770

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以下哪一項有助於航空業賺錢？（A）燃油價...
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反覆看很久終於找到這段~~

The profits the industry has made are mainly because of cost-cutting in the industry through improved efficiency and consolidation

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