My mother is the type of woman who suspects that a late night call or a surprise invitation is a of bad news.
A. symptom
B. solution
C. subject
D. sign
网友回答
A. symptom
B. solution
C. subject
(答案→)D. sign
解析：考查名词辨析。Symptom症状 solution解决办法 subject主题 sign 标志，符号，迹象。句意为我的妈妈是一种对深夜的电话或者突然的邀请都怀疑成不好消息的迹象的女人。