Question

【题目】The manager ____ nothing about the matter ____ he read his secretary’s report.

A. had known, when B. has known, before C. will know, after D. knew, until

Answer 1

【答案】D

【解析】

试题when当……时；before接时间点，表示在某时之前； after接时间点，表示在某时之后；until直到。句意：直到读了他的秘书的报告，经理才对这件事情有所了解。结合语境可知本句描述的是过去某时发生的动作，故用一般过去时态，选D。