单选题 Chinese people are now enjoying better dental heath, as shown by the declining______ of tooth decay.
【正确答案】 A
【答案解析】解析：本题考查句意和名词辨析。incident“事件，事故”；treatment“治疗”；consequence“结果，后果”；misfortune“不幸，厄运”。根据句子意思应该是减少蛀牙的事件，故答案选A。