单选题 Not until ______ the whole thing to him ______ that he was wrong.
  • A. had I explained, he realized
  • B. had I explained, that he realized
  • C. I had explained, that he realized
  • D. I had explained, did he realize
【正确答案】 D
【答案解析】[解析] 本题考察not until引导状语从句表示强调时句子的倒装结构，not until引导的状语从句+主句倒装，故本题选D。