B KEY→P9
范畴:人与自然 主题:自然生态 体裁:说明文 难度:★★★★ 建议用时:7分钟 评价:/4
Over the next few months, the northern lights may be the strongest they have been for about 20 years. This light show on the earth is caused by storms on the sun's surface which create clouds of charged particles. Usually you'd need to be closer to the North Pole to see the northern lights, but with the right knowledge and preparation—and a bit of luck—you might see them in the UK in winter.
The stronger the solar flare is, the further south the northern lights will be seen. The particles take around a day to travel to the earth, which means you can predict when they are coming. Just as there are weather forecasts online, there are northern lights predictions and apps. Ask an adult to help you find a prediction tool. Check the weather prediction too, because a cloudy sky means you won't see much.
You'll need to wait until it's dark; this will be a bit easier after 29 October, when it will get dark earlier. Pick a place that is as far away from man-made lights as possible. If you're in your garden or a park, you'll need to try to get away from street lamps or turn off house lights. Your chances will be higher in the countryside, but if the conditions are right, it is possible to see them from a city. You'll need a clear view of the sky, not blocked by any buildings.
Wear warm clothes, a hat, a scarf and gloves because if you are sitting or standing still, it's easy to get cold. Let your eyes get used to the dark. Each pupil of yours will react to the conditions and become as large as possible so that it can collect more light. Put away bright lights like mobile phone screens and look towards the northern horizon.
The northern lights are quite difficult to see with human eyes. If you have a digital camera, looking through this can help. Sometimes lights that look soft green to the eye can be a brighter green through a digital camera. Even smartphones' cameras can pick them up. If you have a digital camera, try a long exposure(曝光时间) with a low shutter speed of a few seconds to take a great photo.
()1. What is the best subtitle for the second paragraph?
A. Pick your spot B. Take photographs
C. Plan when to watch D. Be patient

()2. What does the underlined word "pupil" mean in Paragraph 4?
A. Someone who is being taught, especially a child.
B. The small round black area at the center of the eye.
C. A piece of skin that covers your eye when the eye is closed.
D. A small electric light that you can carry in your hand.
()3. 新考法·组合选择 What can we learn from the last paragraph?
① We can see the northern lights easily with eyes.
② Traditional cameras can help us see northern lights.
③ We can even take pictures of northern lights with smartphones.
④ A digital camera can make soft green to the eye become a brighter green.
A. ①② B. ③④ C. ①③ D. ②④
()4. What is the structure of the passage?

在接下来的几个月里，也许会出现近二十年来最强烈的自然奇观北极光。有了充分的准备，再加上一点运气，冬天你可能会在英国看到北极光。本文介绍观看北极光的几个注意事项。
1. C 标题概括题。由“The particles take around a day to travel to the earth, which means you can predict when they are coming ... Ask an adult to help you find a prediction tool. ”可知，第二段的最佳小标题是Plan when to watch。
2. B 词义猜测题。由下文可知，它尽可能地变大，以便它可以收集更多的光，上文对应表示：你的每个瞳孔会对环境作出反应。
3. B 组合选择题。由最后一段中“Sometimes lights ... can pick them up. ”可知，③④符合文意。
4. A 篇章结构题。第一段总述冬天你可能会在英国看到北极光，第二、三、四、五段分别介绍看北极光的注意事项，故本文结构为A项所示。