单选题 The passage suggests that the beginning of severe psychotic symptoms of acute schizophrenia may be any of the following EXCEPT ______

A、 debilitating
B、 sudden occurrence
C、 occurring after a long period of normalcy
D、 drug-induced

【正确答案】 D

【答案解析】[分析] 推断题型。见文章第四句：Others have many episodes during a lifetime but lead relatively normal lives during interim periods.……但在发作间歇过着相对正常的生活。由此可推论：发病时人体的机能不能正常发挥，处于虚弱状态即选项A。明显的症状是与C相符，间歇发作。文章第一句With the sudden onset of暗示疾病是突发的，即选项B。关于药物是否会引发疾病发作没有任何信息提示，故选项D应为答案。