My sister is very upset todayIt is your fault. You the bad news to her yesterda

问题补充：

--- My sister is very upset today.

--- It is your fault. You the bad news to her yesterday.

A. should tell

B. should have told

C. shouldn’t tell

D. shouldn’t have told

答案：

A. should tell

B. should have told

C. shouldn’t tell

(答案→)D. shouldn’t have told

解析：句意：— 我的妹妹今天很难过。— 那是你的错。昨天你不应该告诉她那个不幸的消息。根据句意可知，不该告诉的消息，却告诉她了。故用虚拟语气。选D。