问题补充：
(·天津卷)Only after Mary read her composition the second time the spelling mistake.
A. she noticed
B. she has noticed
C. did she notice
D. does she notice
答案：
A. she noticed
B. she has noticed
(答案→)C. did she notice
D. does she notice
解析：“only＋状语”位于句首，句子用部分倒装结构。选C
