With global warming and melting ice, it isn't easy being a polar bear anymore. Some studies have predicted that polar bears could die out by the end of the century. The good news is not all researchers think the bears are absolutely disappearing. Scientists at the American Museum of Natural History(AMNH) have published a new paper indicating that things might not be as bad for polar bears as some scientists expect.

To understand the reason for the researchers' cautious optimism, we must first understand the factors that are threatening the polar bear's existence. Polar bears consume a diet of mainly young seals. In order to hunt these seals, polar bears need to rest at the top of sea ice—the same ice that is increasingly melting for most of the year thanks to climate change. In another 50 years, experts expect that the Arctic will be too warm for sea ice to form for half of the year, leaving polar bears without a reliable food source and in serious danger of starvation.

As it turns out, alternative food sources for the polar bears aren't completely out of the question. For as long as biologists have tailed after the animals, they've seen polar bears eating animals found on land like caribou(驯鹿) and snow geese—as well as the snow geese's eggs.

    Can polar bears actually survive off these alternative food sources for long periods of time? To figure this out, researchers calculated the nutrients that a caribou and snow geese diet would provide. They found that even adult male polar bears would be able to obtain more calories than would burn in hunting these meals. Moreover, the food would provide the food lecessary to avoid starvation during the summer months.

    Unfortunately, not all polar bears have tended to seek food on land. That said, the researchers expect that necessity would push more polar bears to hunt on land to avoid starvation. They also expect that the bears could learn from their fellow bears how to hunt on land until the practice becomes second nature.

请阅读下面文字及图表，并按要求用英语写一篇150个词左右的英语短文。

    You really should finish compiling that boring spreadsheet, but you just can't bring yourself to do it. Maybe it can wait a little longer? Or it might just disappear if you ignore it long enough? You know the feeling.

    According to Professor Piers Steel, of the Haskayne School of Business at the University of Calgary, 95% of people postpone important tasks at some point. But for some, procrastination (拖延症) isn't occasional, but constant. Professor Joseph Ferrari, of DePaul University Chicago, found that 20% of the population of the world are habitual procrastinators. Sadly, delaying our duties isn't very good for us. As the poet Edward Young wrote: “Procrastination is the thief of time”.

【写作内容】

1）. 用约30个单词概述上述信息的主要内容；

2）. 结合上述信息，简要分析“拖延症”产生的原因及危害；

3）. 根据你的分析，就如何克服“拖延症”谈谈你的看法（不少于两点）。

【写作要求】

1）. 写作过程中不能直接引用原文语句；

2）. 作文中不能出现真实姓名和学校名称；

3）. 不必写标题。

A nurse of 78 this weekend celebrates 60 years of walking the wards - and she has no plans to retire.

Jackie Reid was 18 when she started work in 1953 - when the National Health Service (NHS) was just five years old - and is believed to be the oldest nurse in Britain.

The diabetes(糖尿病) specialist had to retire at 65 but returned as a nurse within two weeks and still does up to four seven-and-a-half hour shifts(轮班）each week.

Mrs. Reid said: "Nursing is hard if you do it correctly but I love my job. Working for the NHS has been my life. I have no other hobbies because I have worked all my life.

Jackie has worked at a number of different hospitals--including one in Scotland.

Her specialist field has been diabetes for the past 40 years. She retrained after her 12-year-old daughter Michelle developed the disease. She currently works at Southend Hospital, Essex.

    Over the last 60years she has treated tens of thousands of patients.

    Jackie believes nursing should be protected from government cuts. She said: "There're lots of things I would say to the government. If you are going to get good care you have to have the resources(资源), you can't do it without enough money. They shouldn't need the cuts that there are in the NHS. It's hard now because there's a shortage of staff."

Jackie has lived alone in Grays, Essex, since her husband did three years ago.

    The couple have two daughters Michelle, 50, and Karen, 54. Jackie added: "My youngest daughter worried about me - she doesn't think I should work as much as I do. I constantly say 'don't worry about me, I'm fine', but she never believes me. I don't like the thought of giving it up and will try to keep going forever."

    It was a hot summer day that found me running down the street with a dollar in my sweaty hand. The closer I got to Sam & Joe's Stationery Store, the more excited I was. After all, a dollar was a tidy sum for an 11-year-old boy in 1961.

    Out of breath, I swung open the door and got a blast of cold air that instantly cooled me off. I was in a place of pure happiness. Sam & Joe's had it all—books, candy, toys, baseball cards，puzzles and games. I went directly to the bar and ordered a bottle of soda. There I sat, considering my next move.

    Books always came first. I picked out five titles. Next came the candy, rows and rows of it. I chose five candy bars, which brought my total to 75 cents. Then a bottle of cold orange juice, a bag of chips and a pack of Ted Williams baseball cards. After paying the clerk, I still had 5 cents.

    I hurried directly to my backyard, where an apple tree patiently waited for me. There, sitting in the shade against its strong trunk, I read my books, ate my candy and drank my orange juice.

    As I sat in my own personal heaven, I started thinking about having more. That's when a fantastic life—changing idea popped into head: If I could get more money, I could buy more books I liked, buy anything I wanted. That's how it all started.

    Some people live to climb the highest mountains. Some people live only dreaming about it while others live to avoid ever climbing at all. But one thing is certain, all people encounter mountains in their life.

    When I was a little girl, my family moved to a tiny town at the bottom of a big mountain. One day after school, while exploring the green woods of this magnificent mountain, I almost fell on a set of stairs. What could these steps lead to? Curiosity got the best of me as I knew it would be starting to get dark soon. I started climbing up those strangely mysterious steps.

    I climbed and climbed. There was nothing but just green bushes and these steps. I had to reach the top! But it was now getting real dark. If I kept going I might not be able to see my way back. My mom would be worried sick if I didn't come home soon. So I ran back home almost in the dark while trying not to get too scared.

    Anxiously I went to bed dreaming about what I would find at the top of this magical mountain. Could there be a castle up there? Maybe I would find a monster(怪物). Maybe I was taking the risk of never coming back home. Or, maybe all I would find was absolutely nothing! But something inside me was going to climb that mountain at all cost. I could hardly wait to try this adventure again.

    Now we live in a world surrounded by the "can't do" attitudes. We all fall down. We all have doubts and regrets. Still we must climb and dream about what's at the top of our mountain. Monsters may appear or the night will fall. But never ever give up on your dream! Never let anyone tell you, "You can't." Dream big and climb high!

    What kind of house will you buy in the future? Would you like to live in a house where your plants can call your phone to tell you that they need to be watered? Or a house that helps you cut your energy bill by turning off the lights when you leave a room? It may sound like science fiction, but it already exists! Come and visit the Smart Home at the Museum of Science and Industry in Chicago, Illinois. It will show how you can live a green lifestyle by making use of advanced technology throughout the home that makes your life easier and simpler.

    The Smart Home uses green technology to record the energy it uses, including electricity, water and gas. The house's energy dashboard (仪表盘) lets you know your energy use through your television and computer. The house greets you with the new information when you walk in the door. It is able to record when you enter and leave rooms, and can switch the lights, television and music off                    .

    The Smart Home is made entirely of recyclable and renewable materials. The furniture is made from used light bulbs, plastic bottles and other renewable materials, but you can't tell from just looking at them. The kitchen countertops (工作台面) are made of recycled glass.

    The entire house is designed to control the use of energy. The roof of the Smart Home has a sustainable vegetable garden, which does little harm to nature. Even the personal computer is green: it uses less power than a 60-watt light bulb. The house can raise and lower the window shades by itself.