问题
选择题
We the postcards yesterday, but it didn’t arrive.
A．should receive
B．ought to receive
C．ought to have received
D．must have received
答案
答案：C
考查虚拟语气。根据but后面的过去式，可知是与过去事实相反的虚拟语气。排除AB。D项不能表示虚拟语气。故C正确。句意：我们本应该昨天就受到贺卡的，但是贺卡还没有到。