Passage 4

Fill in the blanks with proper words.（在短文的空格内填入适当的词，使其内容通顺。每空格限填一词，首字母已给）（14分）

If we live a natural, open-air life, we shall have little need of doctors or medicine. Many of our grandmother's ideas on how to keep well have c 1 in recent years. Better habits of life has almost taken the place of the medicine.

It was believed that night air was largely r 2 for fevers and colds. Doctors now say that one of the surest way to keep well is to live and sleep in the open air. I have slept in the open air for some time in winter at the temperature of six degrees b 3 zero. Of course it is foolish for anyone to sleep in rain or snow. The whole idea of open-air sleeping is to b 4 fresh air instead of the air full of dust and germs（病菌）.If we become outdoor sleepers, coughs and colds will be almost unknown.

One can almost tell a man who sleeps in the open by looking at him. His eye is clear and his cheek is rosy. There is no surer way to become well and strong than to get used to this habit. Then you can laugh at the doctor and t 5 the medicine bottles away. I know that many parents will not agree with me, and they will feel that to advise a boy to sleep in the open when the weather is extremely cold is like inviting them to his death. It is a fact that everyone would be h 6 and happier if they follow this idea.

Some doctors have already agreed on this method of sleeping for sick people. In some h 7 even babies are given open-air treatment（治疗）.I have been free from any sign of coughs or colds. In the past two years, I have been an outdoor sleeper. Snow sometimes covered the foot of the bed and cold winds blew about my head.

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