问题补充:
That day they there on foot, but they took a taxi. The place was only 50 meters away from the railway station.
A. must have gone
B. shouldn’t have gone
C. could have gone
D. couldn’t have gone
答案:
A. must have gone
B. shouldn’t have gone
(答案→)C. could have gone
D. couldn’t have gone
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。