题目

Not until recently_____that Thompson had been telling the truth all along.A. I realizedB. did I realizeC. I did realizeD. realized I

Not until recently_____that Thompson had been telling the truth all along.

A. I realized

B. did I realize

C. I did realize

D. realized I

题目解答

答案

B. did I realize

解析

本题考查知识点：not until 引导的时间状语从句位于句首时的倒装结构。
解题思路：当“not until + 时间状语”位于句首时，主句要使用部分倒装结构，即把助动词、情态动词或系动词提到主语之前。在一般过去时中，需要借助助动词“did”，将其提到主语前面，动词还原为原形。
解析：

  1. 首先明确句子结构，“Not until recently”是时间状语，位于句首。
  2. 因为“not until”位于句首，所以主句要部分倒装。原句正常语序是 “I didn't realize that Thompson had been telling the truth all along until recently”。
  3. 变为倒装句时，把助动词 “did” 提前，动词 “realize” 用原形，即 “did I realize”。
  4. 选项A “I realized” 是正常语序，不符合要求；选项C “I did realize” 没有倒装；选项D “realized I” 语序错误。