I’ll tell Mary about our changes tomorrowWhat? You her yesterday. A. ought to t

问题补充：

--- I’ll tell Mary about our changes tomorrow.

--- What? You her yesterday.

A. ought to tell

B. must have told

C. might have told

D. should have told

答案：

A. ought to tell

B. must have told

C. might have told

(答案→)D. should have told

解析：考查情态动词。句中考查should have done本应当做。句意：——我将告诉玛丽我们明天的改变。——什么？你本应当昨天告诉她了。