I Mr White at that time, otherwise I wouldn’t have asked you for some information about him.
A. hadn’t known
B. didn’t know
C. don’t know
D. haven’t known
网友回答
A. hadn’t known
(答案→)B. didn’t know
C. don’t know
D. haven’t known
解析：考查时态。根据句意：否则我就不会问你关于他的那么多的信息，可知我过去不认识怀特先生，故用一般过去时，选B。