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
A。
表示对过去情况的推测：“你可能和Barbara住在一起了”；must语气太肯定，与前面具有疑问语气的Oh, did you?不符。