听材料，回答下列各题： A unique laboratory at the University of Chicago is busy only at nig

ht. It is a dream laboratorywhere researchers are at work studying dreamers. Their findings have (26)___________ that everyonedreams from three to seven times a night; although in (27)___________life a person may remember none oronly one of his dreams. What people dream usually (28)___________ !heir waking life experiences, whichare mostly visual in nature. Dream is (29) __ to be a passive event, a (30)___________ that peopleexperience but do not (31) __ control. While the subjects - - usually students___________sleep, specialmachines record their (32) __ waves and eye movementss well as the body movements thatsignal the end of a dream. Surprisingly, all subjects sleep (33) . Observers report that a personusually feels anxious before a dream. Once the dream has started, h is body relaxes and his eyes becomemore active, as if the curtain had gone up on a show. As soon as the machine indicates that the dreamis over, the sleeper is weakened by the researcher. He (34)___________, records his dream, and goes backto sleep___________perhaps to dream some more. Researchers have found that if the dreamer is wakened afterhis dream (35)___________, he can usually recall the entire dream. If he is allowed to sleep even five moreminutes, his memory of the dream will have faded. 第(26)题___________