问题
选择题
—"I stayed at a hotel while in New York."
—"Oh, did you? You _____ with Barbara."
A．could have stayed
B．could stay
C．would stay
D．must have stayed
答案
答案：A
考察虚拟语气。句意：当我在纽约时，我住在一个旅馆。——哦，是吗？你可以喝芭芭拉一起住啊! “could+have+done”是虚拟语气，表示对过去事情的假设，意思是本来能够做某事而没有做。故选A。