【题目】—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

【答案】D
【解析】句意：——父亲，你答应过。——是的，我的确答应过，但是是你先不遵守承诺。上句动词是promised，因此下句应该用did, so did I表示“我也一样”，so I did表示“我确实许过诺”。故选D。