Question

I ____ Mr. White at that time, otherwise I wouldn’t have asked you for some information about him.

1. A.
   hadn’t known
2. B.
   don’t know
3. C.
   didn’t know
4. D.
   haven’t known

Answer 1

C
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
点评：时态的考查要根据上下文的语境进行，要根据句子中的关键词来考查句子的时态。这题的关键词是后面的wouldn’t have asked。