问题
选择题
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
答案：B
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。
搜题请搜索小程序“爱下问搜题”