After ruling the tennis world for almost five years,Roger Federer is adjusting to life at NO.2.But,like any king whose throne has been taken away,the Swiss star is already planning secretly bis return to power,beginning at this week's US Open.

    The problem is, many experts think he will never do it.They blame everything from age and tough competition to his racket and psychology.

    For years Federer, had enjoyed the view from the top.Competitors saw him as undefeated,and for the most part he was.However,before the 2008 season began,Federer had an illness that stole his strength and clearly affected his play on the court.Ever since,he has struggled to return to form,winning just two of his last 14 tournaments.

    "Twenty-seven is an age when your body starts talking back to you."tennis great John McEnroe told the New York Times.

    Pancho Sefura, another tennis great, noted that Federer is also facing a maturing crop of young talents."There are too many great players now,"he said,naming Britain's Andy  Murray,21,and Latvia's Ernests Gulbis,20.

    US magazine Sports Illustrated tennis columnist Jon Wertheim suggested that part of Federer's problem could be his insistence on using a small racket.He says that the smaller head demands ball control.But we see time and again that racket makers try to get players to use a certain stick-one they would like to market to consumers and it has a negative effect on the professional game.

    Sports psychologist Jim Loehr told the Times that Federer is probably feeling "a sense of doubt"after being considered as undefeated for so long.If Federer is to recover his state of being undefeated,Loehr said he must overcome his doubt."Federer doesn't need fame and money.But he has to get better.He has to go t.o a whole new level.That's the only way he stays in the game," he said.

    As for beginning his first Grand Slam in ages as the NO.2 seed, Federer said it might be for the best."Five years almost,I was expected to win every tournament I entered,"he said,"so maybe Rafael Nadal now feels what I had to feel for a very long time.It will be interesting to see how he handles it."

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    Eldon Musk, the entrepreneur and CEO of Tesla and Space X, may have a little more time on his hands, as he's leaving his position on the board of the Open AI, according to a blog post.

    The departure is likely the result of Tesla's moving into the field of Artificial Intelligence (AI), which he said in 2017 would be the “best in the world” and would even be able to “predict your destination.” Musk will continue to “donate and advise the organization,” Open AI said in a blog post on Feb. 20, adding that “As Tesla continues to become more focused on AI, this will avoid a potential future conflict for Eldon.”

    Musk and Y Combiner CEO Sam Altman co-founded the nonprofit enterprise in December 2015, its mission is to develop safe artificial general intelligence and ensure those developments are made public. Open AI researchers published a paper on the site ArXiv.org, detailing the possible secure threats that come with “malicious” AI. In fact, Musk has heard the “evil AI” alarm several times. On Aug. 11, 2017, he warned that artificial intelligence poses a bigger threat to humanity, and he told a gathering of state governors that the government needs to regulate AI before robots start “killing people.”

    Musk's departure from the Open AI board could mean big things for Tesla. As Eton Goodbye, a financial reporter, noted on Futurism, the move “could signal that Tesla is more deeply committed to their own AI projects than we thought.” He added, “Those who have had their ears to any rumors (谣言) that Tesla is ready to deliver vehicles capable of Level 5 autonomy could take this new Open AI development as a sign that the company is inching closer to that unapproachable goal.” No company has reached that level of autonomy, which means that a driverless car could navigate any road under any conditions and that all the human “driver” would need to do is to input a destination.

    Thousands of years ago, Britain was covered by thick forests, home to many animals which no longer live in the United Kingdom. But all this has changed. Now the population of the United Kingdom has increased to sixty-five million. Three-quarters of Britain consists of fields, towns or cities. Although 25 percent of land is countryside, new methods of farming mean that there are fewer birds and small animals living in fields than ever before. Now, the United Kingdom does not have large wild carnivores (肉食动物). In Scotland, there are only 400 wildcats-Europe's rarest cats-but these are much smaller than wolves.

    Some people would like to change things, however! Some organizations and writers say that Britain needs to become more natural again. They suggest that trees and plants that grew in the United Kingdom before towns and cities were built should be allowed to grow again. They even say that large wild animals which have not lived in the United Kingdom should be helped to return and live wild. They call this "rewilding".

    Not everyone agrees. In the last twenty years, over one million trees which originally grew in Scotland have been planted and there are plans for more - but wild animals? Some people ask if wolves will attack sheep or even humans. They are also angry that rewilding might mean an end to walking in the hills which so many people enjoy. So far, there are no wolves or bears in Britain's forests - but soon there might be!

    During World War Ⅱ, William Powell served in Europe as a solider in the US Army. Golf was his hobby. He played at some of the most popular courses in Scotland. However, upon his return home, William Powell was discouraged to find that he wasn't allowed to play golf at local courses because he was an African American. William Powell took a unique approach to solving his problem. He built his own golf course.

    William Powell began the construction of the Clearview Golf Course in 1946. He moved rocks and spread grass seeds to build a golf course in Canton, Ohio. He convinced two African American doctors to invest in the course and continued to build it for the next year and a half. William Powell built it without the help of a designer. He did it while working at night as a security guard. In 1948, the Clearview Golf Course opened, and the business is still popular today.

    In 1967, William Powell's daughter, Renee, became a professional golfer on the Ladies Professional Golf Association (LPGA) tour. Now, she serves as Head Professional at her father's golf course. In 2001, the Clearview Golf Course was one of the 15 golf courses listed on the National Register of Historic Places. It's the only course owned, built, designed and run by African Americans. The Clearview Golf Course not only serves as a challenge to experienced golfers, but also provides an enjoyable round for those players who are new to the game.

    In 2009, the Professional Golfers' Association of America (PGA of America) honored William Powell with a Distinguished Service Award. William Powell, 92 years old, accepted the award politely. "I have had so many special things happen to me, because the golf sees no color," he said.

    In 1963, at age 65, my grandfather, Erwin, decided to build a new house. He wasn't quite sure what to do with the old house since it sat where the new house would be. He finally hired a powerful vehicle to push it far out into a small group of trees. That old house sits there to this very day.

    Erwin and his wife, Elida, passed away, and I purchased the farm from their estate. My wife and I raised our sons on this place and have lived here for more than 30 years. When we first moved in, my wife took one look at the deserted house and declared it a hidden danger. I agreed and planned on a large bonfire. But I thought it appropriate to check out the house first, just in case something of worth had been left behind.

    I walked through the tall grass in the meadow where the old house sat. Time had worn it out. The entrance floor had fallen down on itself and most of the windows were gone. We entered through an open window. ①Here lay the reminders of my grandparents' lives: a broken chair, some old clothes ... But the thing that drew my eye was a cardboard box stuffed with papers. I dug through its contents and was instantly transported back in time. There was a tax return from 1957. Greeting cards from old friends and relatives, now all dead and gone. An uncle's third-grade spelling book. So sweet were the memories that the old house was spared the torch.

    As we hurried through our lives, my visits grew infrequent. I might catch a glimpse of the house through the trees and remembered how, as a child, I would struggle to walk in my father's footprints. Even then, I could imagine no nobler calling than farming, just like Dad. Then, one April morning, my father was felled by a massive heart attack, at age 68. The entire family was shocked by his passing, none more than me. Why I visited that old house on a day shortly after my father's funeral is still beyond me. It was as though it were calling; even the trees seemed to whisper an invitation to come, to visit, to stay awhile.

    ②As I stood once again on that ancient floor, my eye was drawn to a pile of papers on the floor. An envelope, yellowed with age, lay on top. A blue stamp on the envelope read "Passed by Naval Censor" How could I have missed this treasure? My father had served aboard the USS Washington during World War II and had written home whenever he could. My grandmother saved all of his letters.

    I removed one letter carefully from its envelope. ③It was dated September 1944. My father would have been somewhere in the South Pacific at that time and all of 18 years old. T studied the familiar handwriting. Dad wondered how the com harvest had been. He supposed that his youngest brother was starting first grade and imagined that he was becoming quite the little man. He asked his mother to greet everyone and said that he missed them all.

    It wasn't hard to read between the lines. Here was a homesick young man, a kid really, who had spent his entire life living upon a sea of flat land grass. Now he was on a different kind of sea, an ocean that was being disturbed by the thunder and the lightning of a world at war. At the bottom of the page, my father had passed on one last message. ④Tears burned my eyes as I read those words he had so carefully emphasized: "All is well here. Please don't worry. I am doing fine."

    As I left the old house that day, I took one last glance back at it over my shoulder. I don't care what any one thinks, I decided. That old house gets to stay there until it rots into the earth.

Faye and Matthew Gooding and their five young sons appear to have perfect lives. Mrs. Gooding 1 beautiful photos of life in their four-bedroom house on Instagram(一种社交软件), and more than 32, 000 people 2 them. For the couple themselves, 3 , this "materially(物质地) perfect world" was lacking something—so now they are giving up all their 4 to travel around the world with their kids.

This was the last Christmas that the couple spent in their house, which has already been sold. Most of their belongings are 5 too. Shortly their Ford car will be sold and the family will take just one backpack each.

Mrs. Gooding said: "Some friends and family think Matt and I are 6 to be giving up so much. It's been difficult giving up so many possessions. Yet 7 enjoying spending time with the boys, I found myself cleaning the house all day before. The older ones were at school and I thought, 'I 8 see them'. I admitted how I felt to Matt. He agreed it felt as if our lives moved around 9 things—both of us working to 10 the mortgage(贷款) and keep ourselves in our materially perfect world."

    They will leave this month and plan to start their 11 in Sweden where they have friends.

Mr. Gooding added: "People have said 'aren't you worried about stability and safety?'— 12 as we have five small children. It is a (an) 13 because we are giving up so much. But we can't wait to spend more time with our sons without the 14 of everyday routines. We don't know what will happen, but we do know if we didn't do this we would always 15 it."