【题目】Mr. White ___________ at 8:30 am for the meeting, but he didn't show up.
A.ought to arrive
B.should arrive
C.should have arrived
D.was supposed to arrived

【答案】C
【解析】句意：怀特先生本应该在8：30来参加会议的，但是他没有出现。should have done”本应该做某事，实际上却未做“。根据后面的did说明是对过去发生的情况的推测。故选C。