【题目】Only after Mary read her composition the second time ________ the spelling mistake.
A. she has noticedB. did she notice
C. does she noticeD. she noticed
在线课程【答案】B
【解析】
试题分析：考查部分倒装。句意：当Mary第二次读她的作文时她才意识到了文章里的拼写错误。only位于句子开头主句需要用部分倒装，此处时态应为过去时，故选B项。