问题补充：
Tony the invitation, otherwise he would have attended your birthday party.
A. couldn’t have received
B. mustn’t have received
C. needn’t have received
D. shouldn’t have received
答案：
(答案→)A. couldn’t have received
B. mustn’t have received
C. needn’t have received
D. shouldn’t have received
解析：句意：Tony不可能接受邀请的，否则他就会参加你的生日聚会了。根据otherwise he would have attended your birthday party.可知这里是否定推测，couldn’t have done过去不可能做了…，must表示推测的时候，用肯定，所以B不对，needn’t have done过去本不必做而做了，shouldn’t have done过去本不应该做而做了，选A。
