Only after Mary read her position the second time the spelling mistake.
A. did she notice
B. she noticed
C. does she notice
D. she has noticed
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(答案→)A. did she notice
B. she noticed
C. does she notice
D. she has noticed
解析：考查倒装句。Only放在句首，并强调状语时，后面使用倒装句式。本题符合这两个条件。句意：只有在玛丽又一次读了她的作文以后，她才注意到那个拼写错误。