问题补充:
单选题
That day they ________ there on foot, but they took a taxi. The place was only 50 meters away from the railway stationA.must have goneB.shouldn’t have goneC.could have goneD.couldn’t have gone
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C解析本题考查情态动词。could have done本能够做。句意:那天他们本能够步行,但他们打的。那个地方离火车站只有50米。