I ____ Mr. White at that time, otherwis...

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

C 【解析】试题分析：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。考点：考查时态

考点分析：

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