问题
选择题
—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
答案
答案：D
题目分析：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
点评：情态动词+完成时是个难点，要知道它们的意思，做此类题时，就很容易做出正确选择