---We expected you yesterday．---I'm sorry. I you say that I couldn't be
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---We expected you yesterday．
---I'm sorry. I ______ you say that I couldn't be here until today．
A.must have called
B.would be calling
C.could have been calling
D.should have called
试题答案
D
情态动词加不定式的完成式表示对过去所发生情况的推测，“should + have +过去分词”，其肯定式表示过去本应发生的事却没有发生，答案为D.例如：You should have apologized to her for not soon replying to the letter．
你本应向她道歉，说明为什么没能及时回信.(可你没这么做)
You should have gone over your lessons．
你们应把功课复习好的.(可事实上你们没有)