Only after Mary read her article a second time the spelling mistakes.A. did she noticeB. s

问题补充：

Only after Mary read her article a second time the spelling mistakes.

A. did she notice

B. she noticed

C. does she notice

D. she has noticed

答案：

(答案→)A. did she notice

B. she noticed

C. does she notice

D. she has noticed

解析：

试题分析: 考查倒装句。Only +状语 位于句首时后面用部分倒装；从Mary read 可知句子是过去时态，所以A选项正确。句意：直到又读了一遍自己的文章，她才发现了那些拼写错误。