单选题 You have to speak to her louder as her hearing is found to be slightly______.
【正确答案】 D
【答案解析】解析:形容词词义辨析。affectionate“情深的,挚爱的”;defensive“防御的,自卫的”;effective“有效的,起作用的”;defective“有缺陷的,有瑕疵的”。根据语境,只有defective符合题意。故答案为D。