—I didn’t take notes at yesterday’s meeting because I had left my pen at home.
—You mine. I it.
A. must have borrowed; wasn’t using
B. may have borrowed; wasn’t using
C. should have borrowed; hadn’t used
D. could have borrowed; wasn’t using
网友回答
A. must have borrowed; wasn’t using
B. may have borrowed; wasn’t using
C. should have borrowed; hadn’t used
(答案→)D. could have borrowed; wasn’t using
解析：考查情态动词+完成时，must have done 表示对过去的事情肯定推测；may have done 表示对过去事情不肯定推测；should have done表示应该做某事而没做； could have done表示过去未完成的事情，根据句子意思，所以选D