题目内容：
根据下列文章,请回答题。A special lab at the University of Chicago is busy only _____26It is a dream_____27where researchers are at work _____ 28 dreamers. Their findings have concluded that_____29dreams from three to seven times each night, _____30in ordinary life a person may_____31none or only one of his dreams.While the _____32sleep, special machines_____ 33their brain waves and eye movements as well as the body movements that_____34the end of a dream. Surprisingly, all subjects_____35soundly._____ 36say that a person usually fidgets(烦躁) before a dream. _____37the dream has started, his body relaxes and his eyes_____38 more active, as if the curtain_____39on a show. When the machine _____ 40that the dream is over, a buzzer wakes the _____ 41. He sits up, records his dream, and goes back to sleep--perhaps to_____ 42some more.
Researchers have found that if the dreamer, is_____43immediately after his dream,he can usually recall the entire dream. If he is allowed to sleep even _____ 44his _____ 45of the dream will have .faded. That' s why most people have many dreams at night, but forget most of them in the morning. A．at noon
B．in the morning
C．at night
D．in spring
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