—My sister is very upset today.
—It’s your fault .You the bad news to her yesterday.
A. should tell
B. should have told
C. shouldn’t have told
D. must tell
网友回答
A. should tell
B. should have told
(答案→)C. shouldn’t have told
D. must tell
解析：考查情态动词。shouldn’t have done本不应当做某事。句意：昨天你本不应当告诉她坏消息。选C。