问题补充:
Not until the motorbike looked almost new repairing and cleaning it.
A. he stopped
B. did he stop
C. stopped he
D. he did stop
答案:
A. he stopped
B. did he stop
C. stopped he
(答案→)D. he did stop
解析:句意:他把摩托车擦洗和修补的和新的一样时才停下来。Not until引导的状语从句位于句首时,主句部分需部分倒装。