摘要： 5.—Alice, you are supposed ______ part in the party in time. —Sorry, but I had an unexpected visitor. A. to take B. to have taken C. to be 5.—Alice, you are supposed ______ part in the party in time.
—Sorry, but I had an unexpected visitor.
A. to take B. to have taken C. to be taking D. taking
【答案】B
【解析】
【详解】考查固定用法。句意：--你本来应该及时参加这个聚会的。--对不起，我有不速之客来访。结合语境，此处指“你本来应该及时参加这个聚会的”，be supposed to do“应该做，理应做…”，由句意可知，“参加”这动作到现在已经完成了，强调“本来应该"，应用现在完成时。故正确答案为B。
