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

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)