单选题Not until she arrived at the meeting room _____ she had forgotten to bring the document.Ashe realizedBdid she realizeCshe did realizeDdoes she realize
单选题
Not until she arrived at the meeting room _____ she had forgotten to bring the document.
A
she realized
B
did she realize
C
she did realize
D
does she realize
参考解析
解析:
句意:直到他到了自习室才意识到忘带文件了。倒装结构。not until“直到……才……”,放在句首时,句子要倒装。其结构为:Not until+从句/表时间的词+助动词+(主句)主语+谓语+...,由于题干是过去式,在构成部分倒装结构时,要借助于助动词did,且需要置于主语she之前,因此B项为正确答案。AC两项不是倒装结构,D中虽然是倒装结构但是助动词使用错误,时态不对。所以这三项均可以排除。
句意:直到他到了自习室才意识到忘带文件了。倒装结构。not until“直到……才……”,放在句首时,句子要倒装。其结构为:Not until+从句/表时间的词+助动词+(主句)主语+谓语+...,由于题干是过去式,在构成部分倒装结构时,要借助于助动词did,且需要置于主语she之前,因此B项为正确答案。AC两项不是倒装结构,D中虽然是倒装结构但是助动词使用错误,时态不对。所以这三项均可以排除。
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