摘要： Not until I came home last night to bed. A. Mum did go B. did Mum go C. went Mum D. Mum went 答案 B 解析 倒装语序的用法.not until 位于句首时要用半倒装的句型.把助动词did提到主语Mum的前面.所以答案为:B

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