问题
选择题
Not until he took off his sunglasses _______ him.
A．I recognized
B．I did recognize
C．did I recognize
D．do I recognize
答案
答案：C
题目分析：考查倒装结构。. Not until放在句首要部分倒装，根据前面动词时态为过去式，所以选C.
句意：直到他摘下眼镜我才认出了他。
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