問題詳情
18._____about it earlier, we could have wamed people of the danger.
(A)Would we know
(B)Should we know
(C)Have we known
(D)Had we known
(A)Would we know
(B)Should we know
(C)Have we known
(D)Had we known
參考答案
答案：D
難度：非常困難0
統計：A(0),B(0),C(1),D(0),E(0)
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