—How was the journey? Did you e back by plane or by train?—For some reason, I came back by train. I ____ back by plane, though.A.could have traveledB.should travelC.might travelD.would have traveled
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A解析试题分析：考查虚拟，could have done表是对过去的一种虚拟，would have done表示对将来的虚拟，句子意思“由于某种原因，我乘坐火车回来的，尽管我想乘坐飞机回来”，所以选A考点：考查虚拟
点评：虚拟是个难点，做题时要注意，could have done表是对过去的一种虚拟，would have done表示对将来的虚拟。