問題詳情
2. Have your passport and flight ticket ready when you _______ to take an airplane.
(A) call on
(B) bring about
(C) check in
(D) check out
(A) call on
(B) bring about
(C) check in
(D) check out
參考答案
答案：[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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