Not until Tom got off the bus his mobile phone missing.
A. did he find
B. he found
C. didn’t he find
D. he didn’t find
网友回答
(答案→)A. did he find
B. he found
C. didn’t he find
D. he didn’t find
解析：考查倒装句：直到汤姆下车以后才发现手机没了。not until........ 直到....才.....的句型，以否定词not until开头的英语句子，后面主句一定要用到装：即把助动词提前+动词，选A。