Last night Li Ping watched the football match at my home, so he in his office.
A. needn’t have worked
B. mustn’t haven’t worked
C. shouldn’t have worked
D. couldn’t have worked
网友回答
A. needn’t have worked
B. mustn’t haven’t worked
C. shouldn’t have worked
(答案→)D. couldn’t have worked
解析：句意，昨天晚上李平在我家看足球赛，所以他不可能在办公室工作。needn’t have done 表示“原本不必做的事却做了”；must have done通常只用于肯定句shouldn’t have done “过去不该做的事却做了” couldn’t have worked表示对过去事情的推测或估计，不可能已经做了某事。故选D。