but a good general to follow is to sleep as long as we have to in order to feel happy

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• 英语翻译It was the first day of our winter holiday.All of us were very happy.Why?Because we have one months to do things we love to do.We are free.Although we have some homework.But we can finish them in several days.And the rest time we can make good use of.My god!We have been very tired after hard studying.In winter holidays,I want to have full sleep and eat good food in order to replenish myself.Last but not the least,I will have a good rest.
• 22.No one is glad to hear that his body has to be cut open by a surgeon（外科医生） and part of it taken out.Today,however,we needn't worry about feeling pain during the operation.The sick person falls into a kind of sleep,and when he awakes,the operation is finished.But these happy conditions are fairly new.It is not many years since a man who had to have operation felt all its pain.Long ago,operation had usually to be done while the sick man could feel ev
• but a good general to follow is to sleep as long as we have to in order to feel happy这里的to follow 是什么用法,还有为什么不用被动.后半句是and be able to work at our best when we awaken
• but a good general to follow is to sleep as long as we have to in order to feel happy
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