Not until .A. did she take off I realizedB. she took off did I realizeC. did she take of

问题补充：

Not until,.

A. did she take off, I realized

B. she took off, did I realize

C. did she take off, did I realize

D. she took off, I realized

答案：

A. did she take off, I realized

(答案→)B. she took off, did I realize

C. did she take off, did I realize

D. she took off, I realized

解析：句意：直到她摘下墨镜，我才意识到她是一位著名的电影明星。Not until引导的状语从句位于句首时，主句部分需部分倒装。