Only after Mary read her composition the second time_________ the spelling mistake.
A．did she noticeB．she noticedC．does she noticeD．she has noticed
A
考查部分倒裝。Only+狀語(yǔ)從句位于句首，后面的句子部分倒裝，把助動(dòng)詞或情態(tài)動(dòng)詞提前。
排除B、D兩個(gè)選項(xiàng)。根據(jù)句意，是過去時(shí)，所以選擇A選項(xiàng)。句意：只有在第二次讀完作文
以后，瑪麗才注意到了那個(gè)拼寫錯(cuò)誤。
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