He said that only after he went abroad what his motherland meant to him.
A. he realized
B. he had realized
C. had he realized
D. did he realize
网友回答
A. he realized
B. he had realized
C. had he realized
(答案→)D. did he realize
解析：本题考查倒装结构。宾语从句中only放在居首，主句主谓要倒装，根据时态用一般过去时。选D。