Only when the war was over .
A. did everything he take back
B. was everything taken back
C. did everything take back
D. has he taken everything back
网友回答
A. did everything he take back
(答案→)B. was everything taken back
C. did everything take back
D. has he taken everything back
解析：原句意思是只有在战争结束以后，一切才被归还。“Only + 状语/状语从句 ”位于句首时，句子/主句要用部分倒装，故选B。