阅读理解

　　No one knows why we sleep, but it’s certain that we need to．People who are prevented from sleeping begin to suffer obvious effects after a few days－they think less clearly, and they fall asleep during the working hours．

　　There are no rules about sleep．Generally speaking, grown-ups sleep about 7 and a half hours each night and probably more than 60 percent get between seven and eight hours．But perhaps eight percent are quite happy with 5 hours or less, and four percent or so find that they want ten hours or more．If you feel all right, you’re probably getting enough sleep．The important thing is not to worry how much other people get－their needs may be different．Exercise doesn’t seem to increase the need for sleep－office workers, for example, sleep for about as long as people doing physically active work．

　　Children sleep more than grown-ups－perhaps 14 to 18 hours soon after birth, going down to grown-up levels by early teenage(青少年)．Sleep patterns also tend(倾向)to be different in the old people, who may sleep less at night than they did when younger, find sleep getting more broken, and often make it a rule to sleep during the daytime．

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阅读理解

　　With the development of economics(经济), the problem of left-behind children(留守儿童)has become a serious social problem．More and more people have realized we should do something to help them．

　　One of the biggest problems is that the children are all hungry for the love from their parents．Many of them can just get a call or a letter from their parents half a year, a year or even several years, which makes some children lost their parents' faces．When they meet their own troubles, they have no one to talk with．Nobody gives them enough care．

　　Because of being too far away from their parents, the left-behind children's study is the second biggest problem．From a survey(调查)about their study, only two per cent of the children get good results, while ten per cent of them are common and eighty-eight per cent of them are poor．What a pity!

　　There are also many other problems of the left-behind children, such as having no ability to protect themselves, unhealthy lifestyles, spending too much pocket money and being crazy about Internet and so on．

　　In a word, to solve all the problems of the left-behind children needs the government, families and schools to try their best together．

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　　No one knows why we sleep, but it’s certain that we need to．People who are prevented from sleeping begin to suffer obvious effects after a few days－they think less clearly, and they fall asleep during the working hours．

　　There are no rules about sleep．Generally speaking, grown-ups sleep about 7 and a half hours each night and probably more than 60 percent get between seven and eight hours．But perhaps eight percent are quite happy with 5 hours or less, and four percent or so find that they want ten hours or more．If you feel all right, you’re probably getting enough sleep．The important thing is not to worry how much other people get－their needs may be different．Exercise doesn’t seem to increase the need for sleep－office workers, for example, sleep for about as long as people doing physically active work．

　　Children sleep more than grown-ups－perhaps 14 to 18 hours soon after birth, going down to grown-up levels by early teenagers．Sleep patterns also tend to be different in the old people, who may sleep less at night than they did when younger, find sleep getting more broken, and often make it a rule to sleep during the daytime．

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完形填空

　　The Great Wall of China has a history of over two thousand years．It runs from the east to the west in North China．It is about 6,300 kilometers 　　1　　．It is often 　　1　　 “Ten-thousand-Li Great Wall”．It is one of the “Seven Wonders” of the ancient world．

　　The Great Wall is wide enough for ten men to walk 　　3　　．Horses can also run along it, too．The Great Wall 　　4　　 stones and bricks(砖)．There are huge stones on 　　5　　 side and on the highest part．But now some sections of it are worn out．

　　There are tall watch-towers alone the Great Wall．Once upon 　　6　　 time, the soldiers kept watching the enemies(敌人)in the watch-towers day and night．They made 　　7　　 on the towers to 　　8　　 each other when the enemies came．

　　Nowadays we don't use the Great Wall to keep away the enemies any more．It is a famous place of interest to all the people in 　　9　　．Every year 　　10　　 people come to visit it form all over the world．

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