阿摩線上測驗
43.By using a variety of cost-cutting strategies, from charging for extras like checked baggage and meals to operating more efficient aircraft, _____ airlines have revolutionized air travel, making it accessible to millions.
(A)union
(B)ecology
(C)effect
(D)budget
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統計： A(4), B(2), C(0), D(6), E(0) #3853102
統計： A(4), B(2), C(0), D(6), E(0) #3853102
