Not until three years ago _______to work overseas.A、he beganB、he beginsC、began

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问题 Not until three years ago _______to work overseas.

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

答案 D

解析 not until置于句首时，主句要求使用部分倒装语序，即将助动词提至主语之前。句子描述的是过去时态，故用did。

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