Mr. White at 8:30 for the meeting, but he didn’t show up.
A. should have arrived
B. should arrive
C. should have had arrived
D. should be arriving
网友回答
(答案→)A. should have arrived
B. should arrive
C. should have had arrived
D. should be arriving
解析：首先排除D项，因为无此形式；should+动词原形表示现在或将来应该；should+be doing表示现在应该正做某事；should have+过去分词表示过去本该做某事而未做。根据题意，A项符合本题要求。