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阅读理解 If you don't use a dictionary. What should you do instead? The first thing you can do is trying to guess what the word means. Often the surrounding context gives a very clear idea of the meaning of the word. Even if you can't work out the meaning exactly, you may be able to get a vague idea, enough to enable you to continue reading. Sometimes it is impossible to guess the meaning of a word from the context and then you will have to decide whether the word is important enough to make it worthwhile stopping and looking it up in a dictionary or whether you can just pass it by A primary school in Wuhan has used new desks and chairs to prevent students from getting short sight. The desks and chairs make students have the correct posture, especially when reading and writing. Each desk has an adjustable steel bar. The bar can help students keep their eyes at least 30cm from books.Zhang Jianming is headmaster of the primary school. She said the new desks and chairs were provided by an eye care centre in the city. The school carried out a survey last September. It showed that about 7 percent of its 1,093 students said they suffered from short sight.The new desks and chairs have already improved the students’ posture, but both teachers and students might need more time to get used to them.Yang Lihua is head of the Wuhan Youth Eye Care Center. She said the desks and chairs were introduced to 19 schools on a trial basis. “During our research into short sight, we noticed that the number of students with short sight was increasing. This is because parents are teaching their children to read and write at a very early age without paying enough attention to their posture,” she said.Feng Junying is a doctor at Beijing Jingshan School. “I think the new desks and chairs in Wuhan will certainly be helpful,” she said. “But bad reading habits at school are not the only reason for short sight. Children are using mobile phones and iPads when they are very young. This can be another reason for short sight at a young age.”【1】According to the passage, the adjustable steel bar can help the students keep their eyes ___________ from books.A. 20cm B. 25cm C. 29cm D. 32cm【2】The schools in Wuhan introduced the desks with bars to the primary school students in order to _______________.A. make students grow tallB. help students have the correct postureC. help students love readingD. not allow students to use mobile【3】Feng Junying’s words mean ___________________________________.A. the number of students with short sight is increasingB. the students don’t get used to the new desks and chairsC. bad reading habits are not the only reason of the students’ short sightD. the new desks and chairs are useless for the students to improve their eye sight【4】 From the passage, a good way to protect our eyesight is to___________________________.A. buy an adjustable steel barB. go to the Youth Eye Care Centre oftenC. have a correct posture when we are studyingD. read less and use mobile phones and iPads less