题目

---Did you listen to the speech? --- No, we ______ it. But we had a lot of traffic on our way. A. could have attended    B.must have attended  C. could attend  D. shouldn't have attended 答案：.A 解析: 该题考查的是虚拟语气，表示“本能……”是与过去事实相反，要用could+have done形式。

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