Only then__________that she had made a mistake.
- A.she realized
- B.did she realize
- C.had she realized
- D.she had realized
正确答案及解析
正确答案
B
解析
考情点拨:本题考查倒装句型。应试指导:句意：只有到那个时候，她才意识到自己犯了个错误。以“only+状语或状语从句”开头的句子要用倒装结构，即把助动词放在主语前。then意为“那时”，表示过去，所以要用一般过去时。
