42 The airlines ____ to us about the long flight delay, but they just kept us waiting and did not sa

問題詳情

42 The airlines ____ to us about the long flight delay, but they just kept us waiting and did not say anything.
(A)could explain
(B)had explained
(C)should be explaining
(D)could have explained

參考答案

答案：D
難度：困難0.2
統計：A(0),B(6),C(5),D(3),E(0)

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