Not until he got to the factory that he had lost his papers.A. he foundB. did he findC. ha

问题补充：

Not until he got to the factory that he had lost his papers.

A. he found

B. did he find

C. had he found

D. has he found

答案：

A. he found

(答案→)B. did he find

C. had he found

D. has he found

解析：考查倒装句。Not until 放在句首使用部分倒装，从句不倒装，主句倒装，根据题中的时态，所以选B。