【题目】—It was careless of you to put your new bike downstairs all night.
—My God!________.
A.So I did
B.So it was
C.So did I
D.So have I

【答案】A
【解析】考查固定用法。句意：——你真是太粗心了,把你的新自行车整夜放在楼下。——天啊,真是这样的。 "so+主语+be 动词/助动词/情态动词 "用于表示对别人所说的情况加以肯定,它的主语与上文主语相同。故选A。