問題詳情

18 The service provided by the Customs-Port-Trade Single Window is ___________ twenty four hours a day allyear-round.
(A) audible
(B) authorizable
(C) available
(D) avoidable

參考答案

答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)