Not until the motorbike looked almost newrepairing and cleaning it.A. he stoppedB. did he

问题补充：

Not until the motorbike looked almost newrepairing and cleaning it.

A. he stopped

B. did he stop

C. stopped he

D. he did stop

答案：

A. he stopped

(答案→)B. did he stop

C. stopped he

D. he did stop

解析：not until 提前，要求主句部分倒装。