I'm part of the Roots & Shoots program founded by Dr. Jane Goodall. The program is intended to make and promote positive changes in the world. As Dr. Goodall says, "What you do makes a difference, and you have to decide what kind of difference you want to make."

    In Bulgaria, where I live, homeless dogs are everywhere. Many people here turn a blind eye to them. But I cannot ignore the life of a street dog whenever I see one wandering in the street, looking for something to eat. That's why I'm no longer a food waster. When I see wasted food, I always think of a hungry dog climbing to garbage bins, searching for food that people have thrown there. When eating in a restaurant, I'm not afraid to take leftover food to feed stray cats or dogs.

    A week ago, I saw a homeless dog around the garbage bins. Immediately I knelt down, spoke to her softly and ran my hands over her. I could see that she had had puppies. I couldn't imagine how she could have been able to care for them. Hours earlier, I'd bagged up a plate of leftover fish. As I unwrapped it, she wagged her tail and sniffed at it. She ate all the fish in no time.

    It's sad, isn't it? I can't understand why many of us waste so much and think little of it. These homeless animals have taught me that food is precious. Even when I don't have leftovers with me, I'll take the time to get something from the grocery store to feed them.

    I know my power is small, so I hope that next time you see wasted food, do turn it into worthy food. You have the power to save a life!

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.

    By now, you've probably been warned that a robot is coming for your job. But rather than repeat the warning, I've decided to throw down a challenge: man against machine.

    Start with the task we're doing right now: communicating in fluent human. We're sharing abstract ideas through words that we choose with an understanding of their slight difference and impact. We don't just speak in human; we speak as humans. A robot who says that science is fun is delivering a line (念一句话). A human who says that science is fun is telling you something important about being alive.

    Here's another inbuilt advantage we take for granted: as humans we are limited by design. We are bound in time: we die. We are bound in space: we can't be in more than one place at a time. That means when I speak to an audience, I am giving them something special. It's a custom-made, one-off, 100% robot-free delivery, from today's one-and-only Australian Chief Scientist.

    True, I now come in digital versions, through Twitter and Facebook and other platforms, but the availability of those tools hasn't stopped people from inviting me to speak in person. Digital Alan seems to increase the appetite for human Alan, just as Spotify (a digital music service) can increase the demand for a musician's live performances.

    Thanks to technology, many goods and services are cheaper, better and more accessible than ever before. We like our mass-produced bread, and our on-tap lectures and our automated FitBit advice. But automation hasn't killed the artisan bakery (面包店). Online courses haven't killed the booming, alongside their machine equivalents.

    Here's a third argument for the win. We humans have learned the habit of civilization. Let me explain this point by a story. A few years go, some researchers set out to study the way the people interact with robots. They sent out a small robot to patrol (巡逻) the local mall. That robot had a terrible time, and the villains of the story were children. They kicked him, bullied him, and smacked (掌击) him in the head.

    The point is not that the children were violent. The point is that the adults were not. They restrained whatever primitive impulse (冲动) they might have felt in childhood to smack something smaller and weaker in the head, because they had absorbed the habit of living together. We call it civilization. If we want artificial intelligence for the people, we'll need every bit of that civilizing instinct.

    Together, these points suggest to me that humanity has a powerful competitive edge. We can coexist with our increasingly capable machines and we can make space for the full breadth of human talents to flourish.

    Singapore's public transport system is one of the best in the world, so you should have no problem finding your way around like a local. There are three main forms of public transport that you would find in any other major city—trains, buses and taxis.

    TRAINS

    Trains run from 6:00 am to midnight. Single trip tickets start at 80 cents. If you buy an EZ-Link cars for $15, you can ride the trains and buses as you like.

    If you need more information, just call Transit Link on 1800 525 7333.

    BUSES

    There are several bus services in Singapore and fares start at 80 cents. Be sure always ask the driver the cost of your ticket as he can not give change.

    If you need help, just call Transit Link on 1800 525 7333.

    TAXIS

    There are three main taxi companies—City Cab (6552 2222), Comfort (6552 1111) and Tibs (6552 8888). Booking can also be easily by calling the numbers listed above.

    RENTAL CARS

    Driving in Singapore is a pleasure and if you liked to travel at your own pace, renting a car is a good choice. Renting takes away the hassle of getting to places around Singapore. Just sit back and enjoy the city. It also means you'll get to see a lot more that a train or a bus won't let you see.

    For car rental, call Avis on + 65 6737 1668.

Music

    Opera at Music Hall： 1243 Elm Street. The season runs June through August, with additional performances in March and September. The Opera honors Enjoy the Arts membership discounts. Phone: 241 -2742. http://www.cityopera.com

    Chamber Orchestra： The Orchestra plays at Memorial Hall at 106 Elm Street, which offers several conceits from March through June. Call 723-1182 for more information. http://www.chamberorch.com.

    Symphony Orchestra： At Music Hall and Riverbend. For ticket sales, call 381-3300. Regular season runs September through May at Music Hall in summer al Riverbend. http://www.symphony.org/honie.asp.

    College Conservatory Of Music (CCM): Performances are on the main campus of the university, usually at Patricia Cobbett Theater. CCM organizes a variety of events, including performances by the well-known LaSalle Quarter, CMM's Philharmonic Orchesira, and various groups of musicians presenting Baroque through modem music. Students with I.D. cards can attend the events for free. A free schedule of events for each term is available by calling the box office at 556-4183. http://www.ccm. uc.edu/events/calendar.

    Rivebent Music Theater.6295 Kellogg Ave« Large outdoor theater with the closest seats under cover (price difference ). Big name shows all summer long! Phone: 232-6220. http://www.riverbendmusic.com

    Hiking England

    DAY 1: ST. BEES TO ENNERDALE BRIDGE

    Our journey sets out early this morning with a Coast to Coast tradition approaching the Irish Sea. Then set off along the rocks of St. Bees Head. Turning inland, we'll pause for a typical pub lunch on our way to Ennerdale Bridge, located at the foot of the Lake District mountains. (15 miles hiking, 8 hours)

    Accommodations: Ennerdale Country House Hotel

    DAY2: ENNERDALE BRIDGE TO HONISTER

    Today we'll walk into impressive Lake District National Park, where glass-like lakes reflect mountains that rise from their shores. Our pleasant walk covers the southern edge of Ennerdale Water, the park's most western lake. After lunch near the Black Sail Hut, climb a 2,000 foot mountain and take in the beautiful views of lakes and pastures (牧场). We finish in Borrowdale, a short transfer (转乘) from our hotel. (13 miles hiking, 9 hours)

    Accommodations: Inn on the Lake

    DAY 3: GRASMERE TO GLENRIDDLNG

    Take a short drive to Grasmere, where the great poet William Wordsworth wrote some of his most well-known works. Visit the poet's home, and walk through the village where he found inspiration. Then climb over Grisedale Hause enjoying views of Helvellyn, England's third-highest mountaintop. Hike down the valley toward Lake Ullswater and spend the night in Glenridding. (9 miles hiking, 5 hours)

    Accommodations: Glenridding Lake Hotel

    DAY 4: LAKE ULLSWATER TO SHAP

    The day begins with a scenic journey on Lake Ullswater to Howtown. From here, we cross a historic Roman road on our way to Bampton. Hike to the 12th-century Shap Abbey. A short transfer takes us to our hotel in the typical English village of Ravenstonedale. (12 miles hiking, 7 hours)

    Accommodations: The Black Swan

Los Angeles Could Be One Of The Few Cities The Olympics Can't Ruin

    In just the past several years, six cities—Boston; Rome; Stockholm; Hamburg, Germany; Krakow, Poland; and Oslo, Norway—have decisively rejected the idea of hosting the Olympics.

    The games' high costs, damaging effects on poor communities in the places that have recently hosted them have turned cities, against them—fostering the belief that "nobody wants to host the Olympic Games anymore."

    But Los Angeles is different. And on Wednesday, the Los Angeles City Council made final decision to try to get the chance to host the 2024 Olympics, taking the step Boston and many others never did. In LA, organizers promise they can hold an Olympics that stays within its $5.3 billion budget Organizers in every possible host city make the same promise. But when it comes to LA, where residents greatly support the plan, even people who doubt the Olympics believe that success in hosting the Olympics without any loss might be possible. "It's basically sound," said Smith College economist Andrew Zimbalist, who wrote the book on the financial risks the Olympics bring to cities and their taxpayers. "I think they'll be able to do it without any financial downside, although there is always some risk attached."

    There's another reason to believe LA could succeed: It's done it before. It last hosted the Olympics in 1984, when the Olympic turned a small profit. No host since has replicated that feat.

    The Los Angeles Coliseum, which was used for the 1932 and 1984 Olympics, will again serve as the place of the games, along with a new NFL stadium set to open in Inglewood in 2019. There's no need for a new Olympic village, thanks to dorms at UCLA. When LA announced its final three stadiums this month, chairman Casey Wasserman said proudly that a Los Angeles Olympics won't require any new construction—instead, it will rely entirely on already planned or temporary (临时的) places.