Mr. White at 8:30 for the meeting but he didn’t show up. A. should have arrivedB. shoul

问题补充：

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

答案：

(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。