I know that there are times when friends are apart for a while – or even forever – and that your lives take different paths. Yet, I always hope for a happy ending. I know that friends reconnect again when it makes sense.

    My friend Julie and I had a long period in our friendship. We used to see each other daily. I would eat brown rice in her kitchen while we shared our secrets.

    Later, we celebrated each other's weddings. My husband and I welcomed Julie's first son (born on my birthday). By the time he was learning to walk, Julie and her family had moved to another city. We spoke on the phone sometimes and exchanged Christmas cards.

    After they welcomed their third son, they moved to Edmonton, which is a farther city. We haven't seen each other since then. They changed their phone numbers. I received a letter from her, but I couldn't find that envelope later. I e-mailed her a few times, but didn't get a reply.

    It was painful not to be in touch with an old friend. I let it go. I knew that Julie and I would reconnect again, when it made sense.

    Last year, Julie's husband got in touch with me on Facebook. I felt something bad, and soon my feeling proved true: Julie had passed away the month before. She died of cancer.

    I regretted that I had not been part of Julie's support system, or the last years of her joyous, painful time on Earth. I cried. I'm so sorry, Julie, for counting on more chances.

    Last week, I donated my hair in memory of Julie to make wigs (假发) for cancer patients. It was a small way of showing that I loved her and will never forget her. And that I look forward to us reconnecting again – when it makes sense.

    One of the most exciting and interesting international cities to visit is London, England. Here is a look at four free things to do during a vacation to London.

    Visit the Trafalgar Square

    Built more than 200 years ago, Trafalgar Square is a popular gathering place for locals and travelers, too. The area is close to good shopping and dining opportunities, and there are usually some sorts of public events or celebrations going on there during most weekends.

    Wander Along the Thames

    Visitors wanting to sec some great architecture, attractions and views should spend an afternoon walking along the River Thames. The best place to start is at the world-famous London Bridge crossing over the river and you can walk all the way to Westminster Bridge a short distance away. Travelers doing this will find themselves passing by a great many historic buildings.

    Explore the Local Markets

    While purchasing items at any of the open markets in London is not necessarily free, walking through them to view the merchants（商人）, their products and the other shoppers is of great fun. Some of the popular open markets in London worth visiting include Spitafields Market, Portobello Road Market and Leadenhall Market.

     Visit the British Museum

    One of the top museums in the entire United Kingdom can be found in London, and it charges no admission（人场费）for entry. This museum is so highly regarded that it is not only popular with locals and tourists, it is also seen as a major and valuable scholarly resource.

    Tim Richter and his wife, Linda, had taught for over 30 years near Buffalo, New York – he in computers, she in special education. "Teaching means everything to us," Tim would say. In April 1998, he learned he would need a heart operation. It was the kind of news that leads to some serious thinking about life's purpose.

    Not long after the surgery, Tim saw a brochure describing Imagination Library, a program started by Dolly Parton's foundation (基金会) that mailed a book every month to children from birth to age five in the singer's hometown of Sevier, Tennessee. "I thought, maybe Linda and I could do something like this when we retire," Tim recalls. He placed the brochure on his desk, "as a reminder."

    Five years later, now retired and with that brochure still on the desk, Tim clicked on imaginationlibrary.com. The program had been opened up to partners who could take advantage of book and postage discounts.

    The quality of the books was of great concern to the Richters. Rather than sign up online, they went to Dollywood for a look-see. "We didn't want to give the children rubbish," says Linda. The books – reviewed each year by teachers, literacy specialists and Dollywood board members – included classics such as Ezra Jack Keats's The Snowy Day and newer books like Anna Dewdney's Llama Llamaseries.

    Satisfied, the couple set up the Richter Family Foundation and got to work. Since 2004, they have shipped more than 12,200 books to preschoolers in their area. Megan Williams, a mother of four, is more than grateful: "This program introduces us to books I've never heard of."

    The Richters spend about ＄400 a month sending books to 200 children. "Some people sit there and wait to die," says Tim. "Others get as busy as they can in the time they have left."

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    Just as John Lubbock said, we may sit in a library and yet be in all quarters of the earth. Here are some of the coolest libraries of the world.

    Stuttgart City Library

    Despite a classic white-on-white color, Stuttgart City Library is one of the most visually appealing modern libraries. The amazing modern and simple look is the product of the Korean architect Yi Eun-young. The German library opened in 2011, and cost nearly 80 million euros to construct.

    Kanazawa Umimirai Library

    Architects from the Coelacanth K&H Architects studio designed the Kanazawa Umimirai Library lo create the best reading environment. Healed floors, an outpouring of natural light, and other features were specifically included lo achieve this goal. The wall, which consists of thousands of tiny openings, allows natural lighting into the building, improving the overall feel of the space. This Japanese library was opened in 2011, and reflects the appearance of many modern and simple spaces.

    Library of Congress

    In 1800, Congress set up the Library of Congress in Washington D.C. Fifteen years later, Thomas Jefferson offered his personal library to replace books that were lost when the British set the building on fire in 1814. His books, which took nearly 50 years to collect, varied from texts on science, literature and philosophy, to books in a variety of foreign languages. These days, the Library of Congress offers more than 155 million items and the largest rare book collection in North America.

    State Library of Victoria

    The Slate Library of Victoria, located in Melbourne, Australia, is one of the largest exhibiting libraries in the world. Though it opened in 1856, major repairs took place between 1990 and 2004. The La Trobe Reading Room is one of the library's main attractions due to its visually amazing architecture. The lawn at the library's front attracts hundreds of city folk each day, who gather for lunch or to enjoy the statues there. The library currently contains over two million books, as well as armor (盔甲) of Ned Kelly, a folk hero against the ruling class.

    It was once common to regard Britain as a society with class distinction. Each class had unique characteristics.

    In recent years, many writers have begun to speak the 'decline of class' and 'classless society' in Britain. And in modern day consumer society everyone is considered to be middle class.

    But pronouncing the death of class is too early. A recent wide-ranging society of public opinion found 90 percent of people still placing themselves in particular class; 73 percent agreed that class was still a vital part of British society; and 52 percent thought there were still sharp class differences. Thus, class may not be culturally and politically obvious, yet it remains an important part of British society. Britain seems to have a love of stratification.

    One unchanging aspect of a British person's class position is accent. The words a person speaks tell her or his class. A study of British accents during 1970s found that a voice sounding like a BBC newsreader was viewed as the most attractive voice, Most people said this accent sounded 'educated' and 'soft'. The accents placed at the bottom in this study, on the other hand, were regional city accents. These accents were seen as 'common' and 'ugly'. However, a similar study of British accents in the US turned these results upside down and placed some regional accents as the most attractive and BBC English as the least. This suggests that British attitudes towards accent have deep roots and are based on class prejudice.

    In recent years, however, young upper middle-class people in London, have begun to adopt some regional accents, in order to hide their class origins. This is an indication of class becoming unnoticed. However, the 1995 pop song 'Common People' puts forward the view that though a middle-class person may 'want to live like common people' they can never appreciate the reality of a working-class life.