B

     If you could have one superpower, what would it be?

     Dreaming about whether you would want to read minds, see through walls, or have superhuman strength may sound silly, but it actually gets to the heart of what really matters in your life.

     Every day in our work, we are inspired by the people we meet doing extraordinary things to improve the world.

     They have a different kind of superpower that all of us possess: the power to make a difference in the lives of others.

We're not saying that everyone needs to contribute their lives to the poor. Your lives are busy enough doing homework, playing sports, making friends, seeking after your dreams. But we do think that you can live a more powerful life when you devote some of your time and energy to something much larger than yourself. Find an issue you are interested in and learn more. Volunteer or, if you can, contribute a little money to a cause. Whatever you do, don't be a bystander. Get involved. You may have the opportunity to make your biggest difference when you're older. But why not start now?

     Our own experience working together on health, development, and energy the last twenty years has been one of the most rewarding parts of our lives. It has changed who we are and continues to fuel our optimism about how much the lives of the poorest people will improve in the years ahead.

    While Jennifer was at home taking an online exam for her business law class, a monitor（监控器）a few hundred miles away was watching her every move.

    Using a web camera equipped in Jennifer's Los Angeles apartment, the monitor in Phoenix tracked how frequently her eyes moved from the computer screen and listened for the secret sounds of a possible helper in the room. Her Internet access was locked — remotely — to prevent Internet searches, and her typing style was analyzed to make sure she was who she said she was: Did she enter her student number at the same speed as she had in the past? Or was she slowing down?

    In the battle against cheating, this is the cutting edge and a key to encouraging honesty in the booming field of online education. The technology gives trust to the entire system, to the institution and to online education in general. Only with solid measures against cheating, experts say, can Internet universities show that their exams and diplomas are valid — that students haven't just searched the Internet to get the right answers.

    Although online classes have existed for more than a decade, the concern over cheating has become sharper in the last year with the growth of “open online courses”. Private colleges, public universities and corporations are jumping into the online education field, spending millions of dollars to attract potential students, while also taking steps to help guarantee honesty at a distance.

    Aside from the web cameras, a number of other high-tech methods are becoming increasingly popular. Among them are programs that check students' identities using personal information, such as the telephone number they once used.

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。

    It is reported that conservation groups in North America have been arguing about the benefits and dangers of wolves. Some groups believe wolves should be killed. Other people believe wolves must be protected so that they will not disappear from the wilderness(荒野).

For Killing Wolves

    In Alaska，the wolf almost disappeared a few years ago，because hunters were killing hundreds of them for sport. However, 1aws were established to protect the wolves from sportsmen and people who catch the animals for their fur．So the wolf population has greatly increased. Now there are so many wolves that they are destroying their own food supply.

    A wolf naturally eats animals in the deer family. People in the wilderness also hunt deer for food. Many of the animals have been destroyed by the very cold winters recently and by changes in the wilderness plant life．When the deer can't find enough food，they die.

    If the wolves continue to kill large numbers of deer, their prey(猎物) will disappear some day. And the wolves will, too. So we must change the cycle of life in the wilderness to balance the ecology. If we killed more wolves, we would save them and their prey from dying out. We'd also save some farm animals.

    In another northern state, wolves attack cows and chickens for food. Farmers want the government to send biologists to study the problem. They believe it necessary to kill wolves in some areas and to protect them in places where there is a small wolf population．

Against Killing Wolves

    If you had lived long ago，you would have heard many different stories about the dangerous wolf．According to most stories，hungry wolves often kill people for food．Even today，the stories of the “big bad wolf” will not disappear．

    But the fact is wolves are afraid of people, and they seldom travel in areas where there is a human smell．When wolves eat other animals，they usually kill the very young, or the sick and injured. The strongest survive. No kind of animal would have survived through the centuries if the weak members had lived. And has always been a law of nature.

    Although some people say it is good sense to kill wolves，we say it is nonsense! Researchers have found wolves and their prey living in balance．The wolves keep the deer population from becoming too large, and that keeps a balance in the wilderness plant life.

    The real problem is that the areas where wolves can live are being used by people. Even if wilderness land is not used directly for human needs, the wolves can't always find enough food. So they travel to the nearest source, which is often a farm. Then there is danger. The “big bad wolf” has arrived! And everyone knows what happens next.

    I've personally traveled through many countries that have had U.S. government warnings issued for them, and I've been perfectly safe. Specifically, in the last year, I have travelled safely to both the Philippines and Mexico, and traveled to many South Pacific islands during the tropical cyclone (热带气旋) season and only experienced two days of light rain in six months! This is, of course, anecdotal, so it's important that you do your research before booking your trip.

    One thing I recommend doing is checking for recent posts on travel forums (论坛), such as Lonely Planet's Thorntree, to see what people are saying about the country you'll visit in terms of safety. The U.S. government may make out that an entire country is extremely unsafe when in reality, it's a small part of it that tourists will be unlikely to visit. Read the travel warnings, too, to see which parts of the country the government recommends that you avoid.

    Additionally, it's worth speaking to your travel insurance provider before you leave to check that you'll be covered during your travels to these countries. Some insurance .companies won't cover you if there's a severe warning for the country, but some will. Travel insurance is a necessity, so it's definitely something to check out before you leave.

    Keep in mind that the U.S. government will help you with emergency evacuation (撤离) from a troubled country, but it comes in the form of a repatriation (归国) loan via the Office of American Citizens Services and Crisis Management (ACS), which can be called to rescue you from a bad situation abroad. Remember by heart that you'll have to wait overseas for the money to arrive and eventually repay the loan once you're home safely. Just another reason to get travel insurance!

    In San Francisco, where the number of the homeless has risen by 7% in the last decade, a non-profit organization is putting bathrooms on wheels and driving them to those in need. The group, Lava Mae, is improving retiring city buses and bringing them into different neighborhoods, currently providing about 200 showers each week.

    Doniece Sandoval, the founder of Lava Mae, first became interested in the issue in 2012, when she passed a young woman under an overpass near the San Francisco Design Center who was repeating to herself that she'd never get clean. "It made me wonder what her chances were," said Sandoval, who was then inspired to research exactly how many public shower stalls（淋浴间）existed in the city. Her findings were disheartening.

    So Lava Mae came together when she heard the city would be retiring cold city buses. "I told myself, I want those buses!" she said.

    Each bus has two private bathrooms, one of which is wheelchair accessible. Along with the basic shower, sink and toilet, the spaces have soft lighting, digital controls for water, and hair dryers.

    "Though you're only going to be on the bus for 20 minutes or so, it's 20 minutes of complete privacy," Said Sandoval.

    The buses are parked near agencies that already serve the homeless. "If we can reduce the amount of time people have to run from place to place to get essential services, we'll be able to make things better," said Sandova.

    What's next for lava Mae? The group is starting a program so that others can mimic their process. " What we're hoping to do is to get people to follow what we do, so they can recreate it." she said.

At my first lesson in Chinese calligraphy, my teacher told me plainly: "Now I will teach you how to write your name. And to make it beautiful." I felt my breath catch. I was curious.

Growing up in Singapore, I had an unusual relationship with my Chinese name. My parents are ethnically Chinese, so they asked fortune tellers to decide my name, aiming for maximum luck. As a result, I ended up with a nonsense and embarrassing name: Chen Yiwen, meaning, roughly, "old", "barley （薏米） "and "warm".

When I arrived in America for college at 18, I put on an American accent and abandoned my Chinese name. When I moved to Hong Kong in 2021, after 14 years in the States, I decided to learn calligraphy. Why not get back in touch with my heritage? I thought.

In calligraphy, the idea is to copy the old masters' techniques, thereby refining your own. Every week, though, my teacher would give uncomfortably on-the-nose assessments of my person. "You need to be braver," he once observed. "Have confidence. Try to produce a bold stroke （笔画）." For years, I had prided myself on presenting an image of confidence, but my writing betrayed me.

I was trying to make sense of this practice. You must visualize the word as it is to be written and leave a trace of yourself in it. As a bodily practice, calligraphy could go beyond its own cultural restrictions. Could it help me go beyond mine? My teacher once said to me, "When you look at the word, you see the body. Though a word on the page is two-dimensional, it contains multitudes, conveying the force you've applied, the energy of your grip, the arch of your spine." I had been learning calligraphy to get in touch with my cultural roots, but what I was really seeking was a return to myself. Now I have sensed that the pleasure out of calligraphy allows me to know myself more fully.

During a recent lesson, my teacher pointed at the word I had just finished, telling me: "This word is much better. I can see the choices you made, your calculations, your flow. Trust yourself. This word is yours." He might as well have said, "This word is you."