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.

    Recently, I experienced a wonderful lesson in how little things still mean a lot. My brother, mother and I live in a very rural district of Hawaii. Our farm is at least a dozen miles from the most basic of services. Therefore, I take weekly trips to COSTCO to get supplies. About a month ago, I finished loading up the car and was about to leave, when a piece of paper caught my eye. I picked it up and read it carefully.

    It was a receipt(收据) from the State Motor Vehicle Division, recording the owner's payment of her Vehicle's Registration fees. At first I thought that I could find the owner. So I waited there for about an hour. Although the receipt had been borne (由……携带) on the wind, where in the busy, crowded parking lot would I find the owner? I looked over the receipt for contact or any personal data, perhaps a license tag(牌照)or telephone number. I checked the date, the fees paid, noted the name of the owner and pocketed the paper. I concluded that the best and easiest step to take was to put the receipt in an envelope and send it to the owner first the next morning.

    By the end of the week, I received a beautiful thank-you letter from a very grateful and happy woman containing a handwritten message and a gift card. In the letter, the woman explained how the wind snatched(夺去) her receipt from a pocket in her car's passenger door. She had searched everywhere for quite some time before giving up.

    It felt great to know I'd helped someone avoid a loss by doing something that at first glance(一瞥) seemed little or even unimportant.

    For 80 years, Macy's Thanksgiving Day Parade has kicked off the holiday season with glorious bands, balloons and floats (花车)，and for one day, it has transformed New York City into a living comic book.

    The Macy's Thanksgiving Day Parade is an annual parade presented by Macy's Department Store. It was first held in 1924. It was organized by Macy's employees, most of whom were first­ generation immigrants(移民)，who wanted to celebrate holidays like they did in Europe. The employees dressed in costumes(盛装)and marched on the streets with floats, bands and live animals borrowed from a zoo.

    With an audience of over a quarter of a million people, the parade was such a success that Macy's declared it would become an annual event.

    In 1927 Felix, the Cat became the first parade balloon to float over the city. Large animal­ shaped balloons replaced the live animals from then on. These giant signature(特有的)balloons are by far the biggest attraction of the parade. Each year sees parade balloons adding new characters from comic strip characters to timeless toys.

    One tradition long gone is the releasing of the balloons after the parade. They would float for days and the lucky finder or finders could claim a cash reward if he or she returned the balloon or its remains to Macy's.

    The parade has gone on every year except during World War Ⅱ when, aside from not having much to cheer about, the helium(氦气)air and rubber used for the balloons were needed for the war effort.

    When the parade returned in 1945，it was televised in New York for the first time and also traveled its current route for the first time.

    Nowadays, more than 10,000 people participate in the parade and the National Broadcasting Company(NBC) will nationwide broadcast it live from 9 a.m. to noon. The NBC has even earned several Emmy Awards for this program.

    As always, the parade will end with a visit from Santa Claus. The joyful old man will get settled in Macy's Department Store after the parade to start a­month­long search for who's been naughty and who's been nice.

    Traffic Light Reading is one of students' favorites! And it's so simple. Here's what to do: Take three pens in different colors, most suitably red, orange and green. But it's not too important as long as teachers and students are both clear on the colour code they're going to use.

    Students read a text, not worrying too much about how much they understand. Teachers can ask them to re-read when students are paying attention to vocabulary. Start by underlining the words that they understand completely (including names, numbers etc) in green.

    Then students re-read the text and underline the words that look familiar-they maybe know them but aren't too sure about them. You guessed it: in orange.

    Finally, students read the text a third time underlining the words they clearly don't understand in red. Sometimes teachers might want to set students a limit for how many red words they underline, telling them only to underline the words that they believe are seriously blocking their understanding of the text as a whole. Generally, however, students are pleasantly surprised by how few words are red and how many are green. Seeing their ability laid out in a visual way really helps to increase confidence.

    Once the whole text is underlined, teachers can give students a limit of 5, 10 or 15 words, depending on the length of the text, and tell them they're only allowed to look these words up in a dictionary. This helps them to recognize words that are actually getting in the way of their understanding of the text and words that they don't know but actually don't impact their whole understanding of the text.

    This is a useful activity that can be done with a printed text, in a Google Doc, on RealtimeBoard, or set as a homework task for some independent study.

    Although one might not think so as a result of the disadvantages, thousands and thousands of ads have shown advertising is of great importance to the society in which people live, either in the United Kingdom, or in many other parts of the world .Advertising is necessary as a means of communicating with others, of telling them about the goods and services that are offered, and of which most of them would never get to hear at all if it were not for advertising. And advertising does a great deal to a rising standard of living conditions.

    In talking about advertisement, one should not think only a commercial on television, or an advertisement in the newspaper or magazines and—in the sense of communication—even the spoken or written words of salesmen. After all, the roots of advertising are to be found in the market place in the ancient times.

    For many years it was thought that it was not enough to just produce goods and supply services. It is only more recently that people came to understand the production of goods would be a waste of resources unless those goods can be sold at fair price within a reasonable time period. In the competitive society in which we live, it is very important that we go out and sell what we have to offer, and advertising plays an important part, whether selling at home or in export market. Around 2 percent of the UK national product is spent on advertising. But it must be thought that this advertising tries to sell goods to customers who do not buy them. Of course, advertising does try to catch the eyes of the buyer, but if the product one has bought does not match what the advertisement had described, it is extremely unlikely that the goods will sell well.

    While staring out of the window during a flight, not everyone will think carefully about the question why airplanes have rounded windows rather than square ones.

    Over the years, aerospace engineering has made huge steps in airplane technology, meaning planes can carry more passengers and go faster. The planes have also changed shape to increase safety—including the windows. As commercial air travel took off in the mid－20th century, airline companies began to fly at higher altitudes to lower their cost—the air density(密度) is lower up there, creating less drag(阻力)for airplanes. However, higher altitudes came with problems, like the fact human beings can't really survive at 30，000 feet. To make that possible, the cabin was changed to a cylindrical(圆柱体) shape to support the pressure inside. But at first, plane builders left in the standard square windows and this expansion meant disaster. The de Havilland Comet came into fashion in the 1950s. With a closed cabin, it was able to go higher and faster than other aircraft.

    However, where there's a corner, there's a weak spot. Windows, having four corners, have four potential weak spots, making them likely to crash under stress—such as air pressure. By curving the window, the stress that would eventually break the window corner is distributed and the chance of it breaking is reduced. Rounded shapes are also stronger and resist deformation(变形), and can thus survive the extreme differences in pressure between the inside and outside of the aircraft.

    Fortunately, designers figured out the lack of design pretty quick. Now we have nice, rounded airplane windows that can resist the pressure of traveling altitude. It gives being able to gaze out of your window to the world from 35，000 feet a whole new outlook, doesn't it?