Using technology, of course. While special services via webcam(摄像头) and cheating detecting software have been developed now, Mettl, an online company, has developed advanced techniques for netting cheaters, which the company claims are even more reliable and easier to use. Whatever small attempt to cheat, he or she will be found out.

    Mettl has adopted a handful of technologies on its test—taking platform, creating a mini monitoring state in an exam. Here's how it works: A test-takersigns on to Mettl and selects hisher exam from the site's library of pre—loaded tests. Facial and keystroke recognition technology confirm the person that has signed in is the very person, and the system records both the test—taker(through the webcam)and the test—taker's screen throughout the test.

    Mettl's technology uses the test—taker's webcam to detect how many people are using the computer. Soon, it will track eye movement well enough to sense whether the test-taker is looking away from the screen, perhaps to Consult a smart phone or a friend in secret. Mettl also monitors the test-taker's screen and can detect when the test-taker has changed a computer or moved from the test. The system will soon be able to record sound, thus detecting whether the test-taker is talking or being talked to.

    If any irregularities are detected, the system flags the incident and reports it back to the test's administrator. This can bring any number of things, depending on the test-giver's wishes: a completeshutdown of the exam, a warning message that appears on the test-taker's screen, even human instructions from the control center.

    Mettl is hoping its technology will help it break into the country's big MOOC markets.

    One summer I was driving from my home town of Tahoe City, Calif., to New Orleans. In the middle of the desert, I came upon a young man standing by the roadside. He had his thumb out and held a gas can in his other hand. I drove right by him. There was a time in the country when you'd be considered a jerk if you passed by somebody in need. Now you are a fool for helping. With gangs, drug addicts, murderers, rapists, thieves lurking everywhere, "I don't want to get involved" has become a national motto.

    Several states later I was still thinking about the hitch­hiker. Leaving him standing in the desert did not bother me so much. What bothered me was how easily I had reached the decision. I never even lifted my foot off the accelerator.

    Does anyone stop any more? I wondered. I recalled Blanche DuBois's famous line: "I have always depended on the kindness of strangers". Could anyone rely on the kindness of strangers these days? One way to test this would be for a person to journey from coast to coast without any money, relying solely on the good will of his fellow Americans. What kind of Americans would he find? Who would feed him, shelter him, carry him down the road?

    The idea intrigued me.

    The week I turned 37, I realized that I had never taken a gamble in my life. So I decided to travel from the Pacific to the Atlantic without a penny. It would be a cashless journey through the land of the almighty dollar. I would only accept offers of rides, food and a place to rest my head. My final destination would be Cape Fear in North Carolina, a symbol of all the fears I'd have to conquer during the trip.

    I rose early on September 6, 1994, and headed for the Golden Gate Bridge with a 50­pound pack on my back and a sign displaying my destination to passing vehicles: "America".

    For six weeks I hitched 82 rides and covered 4,223 miles across 14 states. As I traveled, folks were always warning me about someplace else. In Montana they told me to watch out for the cowboys in Wyoming; in Nebraska they said people would not be as nice as in Iowa. Yet I was treated with kindness everywhere I went. I was amazed by people's readiness to help a stranger, even when it seemed to run contrary to their own best interests.

    A new study has found the amount of antibiotics(抗生素)given to farm animals is expected to increase by two-thirds over the next 15 years. Researchers are linking the growing dependence on the drugs to the increasing need for meat, milk and eggs. However, the drugs could quicken the development of antibiotic-resistant infections(感染). Such infections are already a major public, health concern in the United States.

    The World Health Organization notes when people stop living in poverty(贫困), the first thing they want to do is eat better, rather than earn more money. For most people, that means their diet should contain more meat. With the rapid development of Asia, people there are eating nearly four times as much meat, milk and other milk products as they did 50 year ago.

    To meet the need, farmers have put many animals into smaller spaces. As the animals are crowded together, the easiest way to deal with some of the problems of crowding is to give them antibiotics. It's clear that antibiotics help animals stay healthy in a crowded environment and grow faster. But bacteria can develop resistance to the drugs gradually.

    Nowadays, doctors find antibiotics that once worked against the infections no longer work. The bacteria have learned ways to fight against the drugs. The heavy use of antibiotics in animals is responsible for the growth of antibiotic resistance worldwide. In the United States, at least two million people get drug-resistant infections each year and at least 23,000 die from an infection.

    Europe has banned the use of antibiotics to increase animal growth. And the United States is hoping to persuade farmers to stop using antibiotics for that purpose.

How satisfied are you with your life? How good do you feel every day? Your answers to those two questions can show how happy you are

It's true that your happiness is partly affected by your genes. {#blank#}1{#/blank#} According to experts, happiness is a choice. It's something that you can develop with continuing practice. Following these tried-and-true tips can help you find happiness.

Be kind to yourself.

Don't compare yourself to others. Everyone has different talents and abilities. It's OK that you're not like someone else. Comparison has been called "the thief of joy". In addition, forgive yourself often. {#blank#}2{#/blank#}.

Take breaks from social media.

{#blank#}3{#/blank#} Yet much of what appears on social media is not real. Many people compare themselves with those images, resulting in feelings of discouragement.

{#blank#}4{#/blank#}.

Spending time with people you love and that love you is necessary for building strong connections and developing a sense of belonging. By devoting time and attention to those who matter most to you, you can create lasting memories, deepen understanding, and strengthen bonds with each other happily.

Get outside for exercise.

Nature helps to reduce stress. Exercise and put your health in the first place. {#blank#}5{#/blank#} Just going on a walk can make a difference.

Limit time you spend on news.

Stay aware of recent events. But don't spend hours consuming news, which usually includes negative stories and events.

Since happiness is a choice, why not choose it? Life will look brighter filled with love and joy!

A. You are not perfect.

B. Invest in your relationships.

C. Determine happiness through actions.

D. You could perhaps lead a happier life and feel more satisfied.

E. But even if you're not usually a happy person, you can change that.

F. People who get up and move are usually happier than those who don't.

G. The Internet is full of people who look beautiful and seem to lead exciting lives.

English businessman Richard Branson made history on July 11, 2021 as he and three other crewmates became the world's first space tourists. The flight was made by a spacecraft named VSS Unity that was built by Branson's company, Virgin Galactic. The flight lasted slightly more than an hour, and took Branson and crew to an altitude（海拔） of 53. 5 miles above the Earth, just a little above the boundary（边界） of space which lies 50 miles above the Earth.

At that height, the atmosphere turns into the black of outer space and the Earth becomes a bent ball of blue. Travelers also exhibit weightlessness as there is no gravity, the force that keeps our bodies walking on the Earth's surface. Therefore, Branson and his fellows were able to float around in VSS Unity while enjoying the views. They were able to do that for three minutes before the spacecraft began its downward journey. It landed back at Virgin Galactic's space port in New Mexico, United States, which is the same place from where it took off 90 minutes ago.

On landing back, Branson said, "I have dreamt of this moment since I was a kid but honestly, nothing could prepare you for the view of the Earth from space. It was just magical. I'm just taking it all in, and it's unreal."

July 11's flight is the start of space tourism for one and all. In early 2022, customers who could afford a ticket for a quarter of a million dollars could line up for a seat on a trip to space. And guess what—they will have a choice of spacecraft. Jeff Bezos, who owns a famous company, is all set to launch himself into space on July 20 on board a spacecraft built by his new branch company Blue Origin. Blue Origin will also carry tourists to space.

Waking up in the morning, you find that you forget to set your wake-up alarm and soon you realize you're going to be late for school or work, causing a panic. {#blank#}1{#/blank#}. So you often leave home stressed, hungry, and thirsty. If this stressful morning routine is common for you, here are some suggestions to help improve it. 

Wake up on time. It's important to wake up on time(or even earlier)to set a positive tone for the day. {#blank#}2{#/blank#}. And you can avoid the last-minute rush and have a more relaxed start to your day, allowing you to face challenges with a clearer head and a more positive attitude. 

Make your bed. This seemingly insignificant act can have a deep effect on your motivation and productivity throughout the day. Research suggests that people who make their beds first thing in the morning are more likely to experience a sense of accomplishment, which can contribute to greater motivation and higher levels of productivity as they handle the tasks and challenges ahead. {#blank#}3{#/blank#}.

Take a 10-minute morning walk. Walking outdoors in the morning can be an incredibly rewarding experience, especially if you have a dog who enjoys accompanying you. {#blank#}4{#/blank#}. The fresh air that greets you as you step outside has the power to refresh your mind, helping you to get rid of sleepiness. 

{#blank#}5{#/blank#}. Organized people tend to do this regularly. It helps them stay on top of their tasks at home, work, and beyond. Make use of the morning time to review your to-do list, mark off completed items, and prioritize(优先处理)your remaining tasks. This can give you a sense of control and direction for the day. 

A. Check your to-do list. 

B. Write down things you're grateful for. 

C. There's no time for any food or drink. 

D. It will give you space and time to complete your morning routine

E. You'll be rewarded by a tidy room, and a feeling of self-satisfaction. 

F. Each morning is the start of a new day, so why not learn something new? 

G. But even if you don't, why not try taking a brief walk outdoors each morning?