Not until three years ago_______to work outside. ( )

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问题 Not until three years ago_______to work outside. (    )

选项 A、he began
B、he begins
C、began he
D、did he begin

答案D

解析 具有否定意义的not until放在句首时,主句要用倒装语序,即将助动词did提到主语he前。答案为D。
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