A. studied sleepwalking for at least ten years. B. concluded that sleepwalkers are partially asleep in their sensory area. C. maintained that it is a mistaken belief that sleepwalkers are immune to injury. D. A andB. 参考答案:D 答案解析:文章在提及Dr.Zelda Teplitz时讲到,此人至少就梦游问题进行过10年的研究而且还推导出梦游者在梦游时脑子处于半清醒状态。