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I ____ Mr. White at that time, otherwise I wouldn’t have asked you for some information about him.
A.hadn’t knownB.don’t knowC.didn’t knowD.haven’t known
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。
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。
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