完形填空：

阅读下面短文， 掌握其大意， 然后从1～25各题所给的四个选项中， 选出一个最佳答案．

(A)

　Swimming and other water sports can be great fun． Yet 　1　people can not swim． Many are 　2　water． They have no confidence (信心) in their ability (能力) to learn to swim well．

　A few years ago, scientists to find out how people learn new skills． They found that, 　3　,the first time a person tried a task determined whether or not he would ever be any 　4　it． For example, if a child tried to rollerskate (穿四轮鞋溜冰) for the first time and did it well, then he would probably become 　5　rollerskater． If he did it badly, then he would probably never good． For this reason, it is important that a person's first step at swimming should be successful．

　Scientists also know that a 　6　experience will do harm to a person's confidence． For example, if a nonswimmer (非游泳者) is 　7　deep water in fun, it will take him a long time to regain (恢复) confidence in the water．

　So learners-swimmers (初学游泳者) should take each step 　8　 ． The first thing to do is to gain confidence in the water． Never jump in at first． Sit on the side． Better still, walk slowly down the steps into 　9　water． Try to walk along the side of the bath． Duck (猛然低下) your head under the water, keeping your eyes open 　10　． Lift your feet off the bottom and let your body float to the surface． You will soon be ready to learn to swim．

(B)

　Of all the men who ever liked fresh air, no one like it more than James Wilson． He took long walks in the fresh air． He ran long distances in the fresh air． He played football and other games in the fresh air． He liked to climb mountains and breathe the fresh air at the top． He used to sit 　11　and watch the great waves in the fresh air． He always slept with his windows 　12　 ． He had an open car with no roof, and he drove it madly through the fresh air．

　If Wilson entered a room where the windows were shut,he immediately opened them． He did this 　13　snow was falling outside． If someone else shut the windows again, he walked out of the room in a manner which showed his opinions without any doubt． When he travelled by sea, he could 　14　in a place on board (在船上) where the wild wind was blowing through his hair．

　One winter Wilson went to Finland (芬兰) on business． Good hotels in Finland 　15　during the cold winter, and this winter was even colder than usual． When Wilson reached his room in the hotel, he found that the windows were closed to keep the icy air out． He did his best to open one,but 　16　． It was absolutely (绝对) impossible to open it because the manager had very wisely arranged that．

　Wilson undressed and got into bed． He was a very angry man．

　The bed room was on the 12． Two or three pictures on the walls showed views of some beautiful parts of Finland． There was no noise at all． The bed was really excellent, but Wilson could not sleep． He could not forget the 　17　window． No fresh air ! It was terrible to think of !

　He got 　18　and tried once more to open the window,but it was useless, and he sadly got back into bed．

　At about one o'clock in the morning he was still awake (醒着) worrying about 　19　in the bed room． He had turned over bed two hundred and thirtysix times． He was very hot． As he turned over for the two hundred and thirtyseventh time; one arm came out of the bedclothes and 　20　． His hand touched the floor． It also touched something on the floor． This thing was 　21　．

　An idea came into his worried mind． Angry men 　22　and the shoe was in his hand in less than a second． Where was the window? He could see something that looked like glass over there． He threw the shoe through the darkness with all the force of his strong right hand．

　The shoe flew straight through the air and 　23　． A terrible sound of breaking glass 　24　the bed room, but to Wilson's sad heart it seemed like the sound of sweet and beautiful music．

　“Now I have some fresh air in the room: ” he thought, “Now I 　25　”．

　Five minutes later he was peacefully asleep． He did not move for many hours．