— Father, you promised!
—Well, ．But it was you who didn't keep your word first．
A. so was I
B. so did I
C. so I was
D. so I did
网友回答
A. so was I
B. so did I
C. so I was
(答案→)D. so I did
解析：考查部分倒装“So + be/情态动词/助动词 + 主语”与表强调的“So + 主语 + be/情态动词/助动词”区别。根据语境“you promised（你许诺过）”和答语“But it was …”可知爸爸回答“我的确许诺过”，且promised是过去时，所以表强调要用助动词did,故选D。句意：——爸爸，你许诺过。——好啦，我的确许诺过。但是是你先没有遵守诺言。