问题
选择题
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
答案：C
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。