問題詳情

45.All drinks served on the airplane are 【complimentary】.
(A) for extra cost
(B) of self service
(C) free of charge
(D) first come, first served

參考答案

答案:C
難度:非常簡單0.9
統計:A(0),B(0),C(9),D(0),E(0)

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