In the past, without the artificial light of the city to bathe in, humans went to sleep when it became dark and then woke themselves around midnight.The late night period was known as

　　“The Watch”．It was when people actually kept watch against wild animals, although many of them simply moved around or visited family and neighbours.

　　According to some sleep researchers, a short period of insomnia(失眠)at midnight is not a disorder.It is normal.Humans can experience another state of consciousness around their sleeping, which occurs in the brief period before we fall asleep or wake ourselves in the morning.This period can be an extraordinarily creative time for some people.The impressive inventor, Thomas Edison, used this state to hit upon many of his new ideas.

　　Playing with your sleep rhythms can be adventurous, as anxiety may set in.Medical science doesn't help much in this case.It offers us medicines for a full night's continuous sleep, which sounds natural; however, according to Warren's theory, it is really the opposite of what we need.

　　1．The example of the French peasants shows the fact that________ .

　　A．people might become lazy as a result of too much sleep

　　B．there were signs of hibernation in human sleeping habits

　　C．people tended to sleep more peacefully in cold weather

　　D．winter was a season for people to sleep for months on end

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