61．Researchers in behavioral psychology are divided with regard to＿＿＿．
　　[A]how dreams are modified in their courses
　　[B]the difference between sleep and wakefulness
　　[C]why sleep is of great benefit to memory
　　[D]the functions of a good night’s sleep
　　62．As manifested in the experimental study，rapid eye movement is characterized by＿＿＿．
　　[A]intensely active brainwave traces 
　　[B]subjects’ quicker response times
　　[C]complicated memory patterns 
　　[D]revival of events in the previous day
　　63．By referring to the artificial grammar，the author intends to show＿＿＿．
　　[A]its significance in the study 
　　[B]an inherent pattern being learnt
　　[C]its resemblance to the lights 
　　[D]the importance of a night’s sleep
　　64．In their study，researchers led by Pierre Maquet took advantage of the technique of＿＿＿．
　　[A]exposing a long-held folk wisdom 
　　[B]clarifying the predictions on dreams
　　[C]making contrasts and comparisons 
　　[D]correlating effects with their causes
　　65．What advice might Maquet give to those who have a crucial test the next day?
　　[A]Memorizing grammar with great efforts．
　　[B]Study textbooks with close attention．
　　[C]Have their brain images recorded．
　　[D]Enjoy their sleep at night soundly．

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