单选题 Right up until the 19th century, physicians and philosophers regarded sleep as a state of near ______ in which there was no mental activity, a kind of halfway stage between wakefulness and death.
【正确答案】 A
【答案解析】[解析] 句意：直到20世纪，内科医生和哲学家们还将睡眠当作一种近似于神志不清的状态，这时候没有思维活动，就像处于觉醒和死亡之间的一种状态一样。oblivion“神志不清，遗忘”，fantasy“幻想；白日梦；幻觉”，allusion“暗示；提及”，illusion“幻觉，错觉；错误的观念或信仰”。