Children can spend hours a day looking at computer screens and other digital devices. Some eye doctors say this leads to an increase in “computer vision syndrome(电脑视力综合症).”
Nathan Bonilla-Warford is an optometrist（验光师）in Tampa, Florida. He has seen an increase in problems in children. “A lot more children come into the office either because their parents have noticed that they have headaches or red or watery eyes or discomfort, or because their nearsightedness appears to be increasing and they’re worried,” he says.
Dr. Bonilla-Warford says part of the problem is that children may be more likely to pay no attention to early warning signs than adults. “Even if their eyes start to feel uncomfortable or they start to get a headache, they’re less likely to tell their parents, because they don’t want to have the game or the computer or whatever taken away,” he explains.
He says another part of the problem is that people blink（眨眼）less often when they use digital devices. He says, “A person who uses an electronic device blinks about one third as much as we normally do in everyday life. And so that can result in the front part of the eye drying and not staying protected like normal.”
Eye doctors offer suggestions like following which is known as the 20/20/20 rule. That means every twenty minutes look away twenty feet or more for at least twenty seconds from whatever device you’re using.
Other suggestions include putting more distance between you and the device and using good lighting. Of course, another way is to spend less time looking at screens. Many experts say children should spend no more than two hours a day using digital devices—with no screen time for children under two.
But not all eye doctors have noticed an increase in problems in children. Dr. David Hunter, from Children’s Hospital Boston, has not seen an increase in his practice. “While it is possible to develop fatigue looking at screens for a long period of time, there’s certainly no proof that it actually causes any damage（伤害）to the eyes.” he says.
1.Which of the following is true according to the passage?
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A．Dr. Bonilla-Warford thinks using computers causes nearsightedness. |
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B．People keep their eyes protected against drying by blinking normally. |
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C．Children under two can watch TV for less than two hours a day. |
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D．Dr. David Hunter says headache causes an increase in eye problems. |
2.What does the underlined word “fatigue” mean?
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A．Interest |
B．Ability |
C．Tiredness. |
D．Difficulty. |
3.What can be the best title for the passage?
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A．Looking at Screen: Two Hours or More |
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B．How Can Children Use Their Eyes Properly |
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C．Using Digital Devices: Advantages and Disadvantages |
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D．How Much Screen Time Is Too Much for Children |
根据所掌握的文化或背景知识，选择正确答案。
1.The slogan of the 30th Olympics is ________________.
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A．One World One Dream |
B．Inspire a generation |
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C．Faster，Higher，Stronger |
D．Start Here |
2.The sign @ on the keyboard means ______ in English.
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A．at |
B．and |
C．an |
D．a |
3.You can see ___ in America.
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A．the Opera House |
B．the Statue of Liberty |
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C．Eiffel Tower |
D．Big Ben |
4.Below are some ideas about America culture. Which of the statements is NOT true?
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A．In the US, most people do their own housework. |
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B．In the US, people who walk their dogs in public should clean up after them. |
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C．In the US, saying thank you is a common way of reacting to a compliment. |
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D．In the US, the bill in most restaurants includes a service change. |
5.____ can prevent the earth from being hurt by harmful rays from the sun.
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A．CO |
B．CO2 |
C．H2O |
D．O3 |
6.__________ lies in the center of China. There are over1,000 lakes in it.
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A．Hubei |
B．Hunan |
C．Anhui |
D．Jiangxi |
At least thirty times Bobby had tried to climb the snowy mountain, but he had never 46 the top. His friend old Peeper, who knew a lot about his failures, 47 Bobby to try again. He gave Bobby a pair of sunglasses and said, “If it starts clouding over, put on the glasses, or if your feet start hurting, put them on too. The glasses are very 48 . They’ll help you.” Bobby received the gift without much thought.
The day came when he was to have another 49 . About two hours after he started, he felt his feet hurting. Then he 50 what Peeper had said, and put on the glasses. The pain was pretty bad, but 51 the sunglasses he could clearly see the snow-covered mountain top, so he went on.
52 , clouds were gathering. But this time Bobby could still see the 53 through the clouds. He kept climbing , leaving the clouds behind, forgetting his pain, and finally arriving at the top. It was certainly worth it. His feeling of 54 was extremely good, almost as great as that 55 view. The mountain below was surrounded (包围) by a sea of clouds. He couldn’t believe that the clouds were as thick as that, so he looked more closely at the sunglasses, and discovered the 56 . Peeper had engraved (镌刻) the snow-covered mountain top on the sunglasses, 57 Bobby could see it when he was looking upwards!
Bobby __58 that the only difficulty to reaching the top had been losing 59 when he couldn’t see the mountain top. He was thankful that Peeper had used that little trick to help him see that his 60 was never impossible, and that it was still there, where it had always been.
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--______ we clean the classroom at once?
--No, you _____. You____ clean it after school.
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A．Must, needn’t, may |
B．Must, mustn’t, can |
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C．Shall, can’t, must |
D．Need, mustn’t, may |
It’s sixty kilometers____ here to the school.
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A．away from |
B．far away from |
C．away |
D．far |
The children were made ____ 12 hours a day.
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A．work |
B．worked |
C．working |
D．to work |
