【题目】Only after Mary read her composition the second time________the spelling mistake.
(2012·天津，6)
A. did she notice B. she noticed
C. does she notice D. she has noticed
在线课程【答案】A
【解析】试题考查only放句首，引导状语从句，主句部分要用到部分倒装。根据语境理解，此句子应该用到过去时态，将助动词did倒装放前面。句子译为当玛丽第二次读她的作文时，她才注意到拼写错误。故选A。