I Mr. White at that time, otherwise I wouldn’t have asked you for some information about him.
A. hadn’t known
B. don’t know
C. didn’t know
D. haven’t known
网友回答
A. hadn’t known
B. don’t know
(答案→)C. didn’t know
D. haven’t known
解析：考查时态：句意是：当时我不认得怀特先生，否则我就不会问你那么多关于他的有用信息了。说明是过去的事实，选C。