----I stayed up late last night for the exam ----_______. A.So did I B.Nor did I

问题描述:

----I stayed up late last night for the exam ----_______. A.So did I B.Nor did I
我知道答案是B,这个题目不是肯定吗,怎么用nor do I

选择A,so did I,表示我也是(为了考试,我昨天晚上熬夜)