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有关睡眠重要性的英语短文

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有关睡眠重要性的英语短文
短文填空
There is no living creature that doesn't need sleep or complete rest every day.
If you want to know _1_ ,just go without sleep for a period of time! You would find it hard to _2_ on your work.So everyone knows the _3_ of sleep.
One of the things that we all know _4_ sleep is that we are unconscious in sleep. we don't know _5_ going on around us. But that doesn't _6_ the body stops all activities. The vital organs go on working during sleep,but most of the body functions slow down.
Your body temperature becomes lower when you are _7_ ,so people always go to sleep under some kind of covers.And even though you are unconscious,many of you reflexes _8_ work.For example, _9_someone touches your foot, you will pull it away in your sleep or even brush a fly from your face.You do these things _10_ knowing it.
这是重庆市南开中学九年级英语半期考试的短文填空题
1.more 2.focus 3.importance 4.about 5.what's 6.mean 7.asleep 8.still 9.if 10.without