Not until some students failed the exam __________how much time they had wasted.

admin2020-12-24 43

问题 Not until some students failed the exam __________how much time they had wasted.

选项 A.they realized

B.did they realize

C.didn' t they realize

D.they didn' t realize

答案B

解析考查倒装。在以never，little，hardly，scarcely，not only，notuntil，no sooner…than，bynomeans等开头的句子中，主谓要倒装，排除A、D两项。这些词或词组本身已经表示否定或半否定意义．所以谓语动词借助肯定助动词即可。故选B。

转载请注明原文地址:https://ti.zuoweng.com/ti/6mT8KKKQ

相关试题推荐

随机试题

二、考题解析 【教案】 TeachingAims Knowledgeaims Studentswillknowtheform...