問題詳情
19.It was not until Ed received Al’s letter ________ he had moved to Iran.
(A)he did know
(B)did he know
(C)that he knew
(D)does he know
(A)he did know
(B)did he know
(C)that he knew
(D)does he know
參考答案
答案：C[無官方正解]
難度：適中0.555556
統計：A(1),B(2),C(5),D(1),E(0)
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