摘要：5．Research findings show we spend about two hours dreaming every night.no matter what we during the day. A．may be doing B．could have done C．must have done D．might have done 解析:句意:“研究调查结果表明.我们每天晚上花费大约两小时作梦.不管我们白天做过什么. no matter what...是让步状语从句.用“must have done 一定--和“could have done “本可.本能 .不合句意.答案是D(“might have done “也许 ). 答案:D

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