3)　Do you know Tom bought a new car?

I don't know, ___.

A. nor don't I care

B. nor do I care

C. I don't care neither　D. I don't care also

解析：答案为B.　句中的nor引出部分倒装结构，表示"也不"。由 so, neither, nor引导的倒装句，表示前一情况的重复出现。其中, so用于肯定句, 而 neither, nor 用在否定句中。