When Charles Lee handed me the small red notebook in 1974, he changed my life. “While you are traveling, you should keep notes of things you see and do,” he explained.

    I was 20 years old, a junior in college, spending a term at the University of London. Charles was a retired traveling salesman. I was staying with him in his cottage in Kendal, located in the Lake District of northern England. It was a one-week homestay the university arranged for us before classes began.

    I took his advice. I wrote in the notebook every day during the homestay. Back in London, I recorded weekend trips to Wales, Yorkshire, France, and Spain. I commented on my classes, professors, and classmates. I contrasted my life at a small college in the US with my wandering through the streets of London, my introduction to life in a big city, and my initial travels outside the US. I tracked ideas I had about my life and my future.

    When I wrote in the notebook, I struggled with a sense of my audience and purpose. Who would read this? Were these writings just for me, or did I want others to read them? Was I recording events and ideas just as a prompt(提示) to memory, or was there some larger purpose for this daily exercise?

    I knew I was recording events, thoughts, words that were important to my life. I imagined a future me sitting down to read the pages. I wondered what it would feel like to read those words later. I wondered where I would be and what my life would be like.

    I filled the notebook Charles gave me. I bought a new one and filled it. Then another and another. I continued writing in notebooks for four decades. By that time, they filled two boxes in my garage.

    I had reread some of the journals. Specific volumes had provided me with the background I needed for dozens of articles for magazines. But I had never read them all. Recently, I decided to bring my collection of notebooks into my office and replay my life. As I opened the first box, I suddenly became nervous would I like the former me described on those pages? There was a risk in opening that first notebook. I did it anyway.

    Charles had been right. I remembered the big events and the central happenings, but on each page were many details I hadn't retained(保留).

    The pages revealed highlights from college classes and stories about roommates and friends. I read anxious comments I'd written as I'd launched my teaching career, learned to write lesson plants, assigned grades for student work, and solved discipline problems. I reflected on my coming marriage, then the wedding, and eventually the proud moments when I held each of my three girls as a father. I recounted more trips—returning to Europe, teaching in South America, going on safari(游猎) in Africa, and exploring Greenland. I relived memories of trails hit, rivers crossed, and mountains climbed.

    The writings in those journals framed my life. I hadn't written every day. I often skipped a few days or even weeks, but I always picked up the writing when it felt important. Journals went with me when I traveled, and I often wrote in them at school when my own students were writing.

    It took several long evenings to read through the notebooks, taking me on tour spanning(持续) 42 years. As I read I could recall sitting on a bench in Trafalgar Square in London or in our apartment in Peru to write to the future me. It was then that I realized: I am now the person I was writing to throughout those years.

    China has the highest adoption rate in the world for technology-enabled payment systems, according to a report released on Wednesday. The report, from the market research firm Nielsen, is based on a survey of 13,000 respondents in 26 countries.

    The survey showed that 86 percent of Chinese respondents said they paid for online purchases during the past six months via digital payment systems compared with a global average of just 43 percent.

    "Chinese consumers have more payment choices for products and services than ever while digital payments will continue to win over more Chinese consumers due to its convenient nature," said Kiki Fan, managing director of Nielsen China.

    The increasingly popular payment method is part of the rapidly evolving purchasing behavior of Chinese consumers. About 98 percent of the respondents in China, the world's largest e-commerce market, said they had made purchases online.

    The majority of them still make online purchases via computers, but the number of those who use mobile devices to make purchases is growing fast and is significantly higher than the average in other surveyed countries.

    At 71 percent, food-related businesses topped the list of purchases made via smart phones while event ticket purchases stood at 51 percent.

    The rising use of digital payments has attracted numerous players to the Chinese market.

    Apple Inc launched its contactless payment system Apple Pay in the Chinese mainland last month. It allows users of the iPhone 6 or more advanced versions, certain iPads and Apple Watches to pay by their devices in bricks-and-mortar stores.

    Apple's rival Samsung Electronics Co Ltd is expected to bring its own mobile payment service to China in mid-March—Sam-sung Pay.

    China's Internet giants Alibaba Group Holding Ltd and Tencent Holdings Ltd have already taken about 90 percent of the mobile payment market, but industry observers said the competition is just about to start.

根据短文内容，选择最佳答案，并将选定答案的字母标号填在题前括号内。

    Should we allow modern buildings to be built next to older buildings in a historic area of a city? In order to answer this question, we must first examine whether people really want to preserve the historic feel of an area. Not all historical buildings are attractive. However, there may be other reasons—for example, economic (经济的) reasons—why they should be preserved. So, let us assume that historical buildings are both attractive and important to the majority of people. What should we do then if a new building is needed?

    In my view, new architectural styles can exist perfectly well alongside an older style. Indeed, there are many examples in my own home town of Tours where modern designs have been placed very successfully next to old buildings. As long as the building in question is pleasing and does not dominate (影响) its surroundings too much, it often improves the attractiveness of the area.

    It is true that there are examples of new buildings which have spoilt (破坏) the area they are in, but the same can be said of some old buildings too. Yet people still speak against new buildings in historic areas. I think this is simply because people are naturally conservative(保守的)and do not like change.

Although we have to respect people's feelings as fellow users of the buildings, I believe that it is the duty of the architect and planner to move things forward . If we always reproduced what was there before, we would all still be living in caves. Thus, I would argue against copying previous architectural styles and choose something fresh and different , even though that might be the more risky choice.

    In the story of “The crow and the Pitcher” from Aesop's Fables, a thirsty crow(乌鸦) drops stones into a narrow jar to raise the low level of water inside so he can take a drink.

    Now scientists have evidence to back up that story. New Caledonian crows actually do understand how to make water displacement work to their advantage, experiments showed. The results suggest that the birds are, at least in some aspects, as smart as first-graders, according to the study.

    Researchers, led by Sarah Jelbert at the university of Auckland in New Zealand, presented six crows with tubes filled with water. Inside the tubes, a worm or piece of meat on a piece of wood was floating, just out of reach of the crow. In front of the tubes, the researchers arranged a bunch of heavy rubber erasers that would sink, and light plastic objects that would float. The crows found out that they could drop the heavy objects into the tubes in order to raise the water level and get their snack.

    However, the birds handled awkwardly in experiments in which they could choose to drop objects in either a wide tube or a narrow tube to get a snack, the researchers said. Dropping objects into narrow tube would lift the water level by a greater amount and put the treat within reach after just two drops. In contrast, it took around seven drops to raise the snack to the same level in the wide tube. The crows obviously didn't realize this, and most of them went for the wide tube first.

    Previous studies showed that chimps and human children can solve similar tasks. In a 2011 study, chimps and kids found out that they could put water into a tube to reach a peanut that was floating in small amount of water at the bottom.

    Is Paperless Office Really Paperless?

    A rising economy increased paper sales by 6 to 7 percent each year in the early to mid-1990s, and the convenience of desktop printing allowed office workers to indulge anything and everything. In 2004, Ms. Dunn, a communications supplies director, said that plain white office paper would see less than a 4 percent growth rate, a primary reason for which is that some 47 percent of the workforce entered the job market after computers had already been introduced to offices.

    For office innovators, the dream of paperless office is an example of high-tech arrogance（傲慢）. Today's office service is overwhelmed By more newspapers than ever before. After decades of development, the American government can finally get rid of the madness on paper. In the past, the demand for paper has been far ahead of growth in the American economy, but the sales have slowed markedly over the past two to three years, despite the good economic conditions.

    “Old habits are hard to break,” says Ms. Dunn. “There are some functions that paper serves where a screen display doesn't work. Those functions are both its strength and its weakness.” Analysts attribute the decline to such factors as advances in digital databases and communication systems. Escaping our craving for paper, however, will be anything but an easy affair.

    “We're finally seeing a reduction in the amount of paper being used per worker in the workplace,” says John Maine, vice president of a paper economic consulting firm. “More information is being transmitted electronically, and an increasing number of people are satisfied that information exists only in electronic form without printing multiple backups.”

    To reduce paper use, some companies are working to combine digital and paper capabilities. For example, Xerox is developing electronic paper: thin digital displays that respond to a stylus, like a pen on paper. Marks can be erased or saved digitally. Even with such technological advances, the increasing amounts of electronic data necessarily require more paper.

    “The information industry today is composed of a thin paper crust surrounding an electronic core,” Mr. Saffo wrote. The growing paper crust is most noticeable, but the hidden electronic core is far larger and growing more rapidly. The result is that we are becoming paperless, but we hardly notice at all. “That's one of the greatest ironies of the information age,” Saffo says. “It's just common sense that the more you talk to someone by phone or computer, it inevitably leads to a face-to-face meeting. The best thing for the aviation industry was the Internet.”