----You forgot your purse when you went out.------Good heavens A. so did IB. so I didC. I

问题补充：

----You forgot your purse when you went out.

------Good heavens,

A. so did I

B. so I did

C. I did so

D. I so did.

答案：

A. so did I

(答案→)B. so I did

C. I did so

D. I so did.

解析：考查so的搭配。“so+同一主语+助动词/情态动词/系动词”表示前面的情况属实，意为：的确如此。句意：—你出来的时候忘记带钱包了。—我的天啊！的确如此。根据句意说明B正确。