Currently offered by some famous universities, MOOCs are attractive to people who do not have the financial resources to meet the growing costs of university education, or who do not have formal qualifications. They also allow participants to study at their own pace.

    The potential for MOOCs to deliver education is obviously vast—they could be considered as a huge step forwards in widening participation. They also have the potential to provide a unique window on universities that offer popular and valuable courses, they may attract some participants to register for formal fee-paying programmes at the same or other universities and are likely to promote new ways of on-line education.

    However, it is still very early days for MOOCs. The quality of the education provision is highly variable, with many courses offering only recordings of lectures, and delivery is particularly difficult in some special fields that require practical classes, research projects or extensive library access. Besides, wider engagement with participants requires very considerable resource. Even limited feedback or examination becomes a major task if there are several thousand students in the class.

Considering the challenges, some people argue MOOCs will soon evaporate (蒸发). But they certainly provide good opportunity for widening higher education, are a means of raising awareness of universities to audiences of tens or hundreds of thousands, and are well worthy of serious consideration.

    Here are a number of English learning tips to help you improve your English. Choose a few of them of get started today.

    Ask yourself weekly: What do I want to learn this week?

    Asking yourself this question every week will help you stop and think for a moment about what is most important to you. It is easy to focus only on the current unit, grammar exercise, etc. If you make a moment to stop of make a careful plan for each week, you will notice the progress you are making and, in turn, become more inspired by how quickly you are learning English! You will be surprised at how this feeling of success will motivate you to learn even more English.

    Quickly review important new information shortly before going to bed.

    Research has shown that our brains process information that is fresh in our brains while we sleep. By shortly(this means very quickly-just a glance at what you are working on at the moment) going over some exercise, reading, etc. before you go to sleep, your brain will work away on this information while you sleep!

    While doing exercises and alone at home or in your room, speak English aloud.

    Connect the muscles(肌肉)of your face to the information in your head. Just as understanding the basics of tennis does not make you a great tennis player, understanding grammar rules does not mean you can automatically speak English well. You need to practice the act of speaking often. Speaking by yourself at home and reading the exercises you are doing will help connect your brain to your facial muscles and improve pronunciation and make your knowledge active.

    Do five to ten minutes of listening at least four times a week.

In the past, I decided I needed to get fit and went jogging-usually three or four miles. Well after not having done anything for many months, those three or four miles really hurt! Needless to say, I did not go jogging for another few months!

    Learning to understand spoken English well is very similar. If you decide that you are going to work hard and listen for two hours, chances are that you will not do extra listening exercises any time soon. If, on the other hand, you start off slowly and listen on a regular basis(five to ten minutes at least four times a week), it will be easier to develop the habit of listening to English.

    Look for situations in which you must speak, read, and listen to English.

    This is probably the most important tip. You need to use English in a “real world” situation. Learning English in a classroom is important, but putting your English knowledge into practice in real situations will improve your fluency in speaking English. If you do not know of any “real life” situation, create new ones for yourself by using the Internet to listen to news, write English responses in forums, exchange emails in English with email pals, etc.

{#blank#}1{#/blank#}on Learning English

    There is an English saying: “{#blank#}1{#/blank#} Until recently, few people took the saying seriously. Now, however, doctors have begun to look into laughter and the effects it has on the human body{#blank#}2{#/blank#}

    Tests were carried out to study the effects of laughter on the body. People watched funny films while doctors checked their hearts, blood pressure, breathing and muscles. It was found that laughter has similar effects to physical exercise{#blank#}3{#/blank#}If laughter exercises the body, it must be beneficial.

    Other tests have shown that laughter appears to be able to reduce the effect of pain on the body. In one experiment doctors produced pain in groups of students who listened to different radio programs. The group that tolerated the pain for the longest time was the group which listened to a funny program.{#blank#}4{#/blank#}

    {#blank#}5{#/blank#}They have found that even if their patients do not really feel like laughing, making them smile is enough to produce beneficial effects similar to those caused by laughter.

A. Laughter can change one's life.

B. As a result of these discoveries, some doctors in the United States now hold laughter clinics in which they help to improve their patients' condition by encouraging them to laugh.

C. The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemicals in the brain which diminish both stress and pain.

D. It increases blood pressure, the heart beating and breathing; it also works several groups of muscles in the face, the stomach and even the feet.

E. Although laughter helps cure the disease, doctors still can not put this theory into clinic practice.

F. Laughter is the best medicine.

G. They have found that laughter really can improve people's health.

    We eat in our cars, at our desks, on the go, and in front of the TV. We eat take-out, packaged and prepared meals. Why? Because it fits our not-enough-time-in-the-day lifestyles{#blank#}1{#/blank#} Well, I'm certainly not the first one to think it—or say it—but we all need to slow down.

    Consumer trends around the globe show that over the past three decades people are purchasing more prepared foods at the grocery and eating out more than ever before. It's predicted that we'll spend more at restaurants in the coming years{#blank#}2{#/blank#}However, we're getting less healthy.

    While debates can be seen indifferent media over the food industry's contribution to our growing waistlines and our health problems, the bottom line is this{#blank#}3{#/blank#}We can choose to eat a fast-food lunch on the go. We can throw a frozen meal in the microwave and call it dinner. We can eat without thinking, in front of the tube, at our computers, and while driving a car.

    {#blank#}4{#/blank#}Studies have shown meaningful links between family meals and kids' mental and physical well-being. Eating sensibly doesn't take much time or money, but it does require you to make a conscious decision to do so. Wrapped in endless work, appointments and social activities, we often fail to enjoy a relaxing meal with our families.

    While it can be a challenge to always put healthy eating first, just do your best. Remember that the food you eat has a more significant impact on your health, weight and well-being than almost any other activity you do.{#blank#}5{#/blank#} Every meal made at home—even just once or twice a week—is a step closer to a healthier body and as lower food lifestyle.

A. Our food matches our lives.

B. Treat it with the importance that it deserves, but start small.

C. We're consuming an increasing number of calories.

D. Lunch is the biggest calorie intake when it comes to eating out.

E. Purchase food locally and skip as many packaged items as you can.

F. What we eat, where we eat and how we eat are all under our control.

G. We can devote an hour of the day to enjoying a meal with our families.

    Artificial intelligence (AI) is rushing into business. Firms of all types are using AI to forecast demand, hire workers and deal with customers. The McKinsey Global Institute, a think-tank within a consultancy, forecasts that just applying AI to marketing, sales and supply chains could create economic value of $2.7trn over the next 20 years.

    Such grand forecasts fuel anxiety as well as hope. Less familiar, but just as important, is how AI will transform the workplace.

    Start with the benefits.AI ought to improve productivity. Humanyze, a people analytics software provider, combines data from its badges（工牌）with employees' calendars and e-mails to work out, say, whether office layouts favour teamwork .Slack, a workplace messaging app, helps managers assess how quickly employees accomplish tasks. Companies will see when workers are not just dozing off but also misbehaving.

    Employees will gain, too. Thanks to advance in computer vision, AI can check that workers are wearing safety equipment and that no one has been harmed on the factory floor. Some will appreciate more feedback on their work and welcome a sense of how to do better.

    Machines can help ensure that pay rises and promotions go to those who deserve them. That starts with hiring. People often have biases but algorithms（算法）, if designed correctly, can be more unprejudiced. Software can flag patterns that people might miss.

    Yet AI^'s benefits will come with many potential drawbacks. Algorithms may not be free of the biases of their programmers, which can have unintended consequences. The length of a travel may predict whether an employee will quit a job, but this focus may harm poorer applicants. Older staff might work more slowly than younger ones and could risk losing their positions if all AI looks for is productivity. And surveillance（监控）may feel Orwellian—a sensitive matter now that people have begun to question how much Facebook and other tech giants know about their private lives.

    As regulators and employers weigh the pros and cons of AI in the workplace, three principles ought to guide its spread. First, data should be anonymized where possible. Microsoft, for example, has a product that shows individuals how they manage their time in the office, but gives managers information only in aggregated（整合）form. Second, the use of AI ought to be transparent. Employees should be told what technologies are being used in their workplaces and which data are being gathered. As a matter of routine, algorithms used by firms to hire, fire and promote should be tested for bias and unintended consequences. Last, countries should let individuals request their own data, whether they are ex-workers wishing to contest a dismissal or jobseekers hoping to demonstrate their ability to prospective employers.

    The march of Al into the workplace calls for trade-offs between privacy and performance. A fairer, more productive workforce is a prize worth having, but not if it chains employees. Striking a balance will require thought, a willingness for both employers and employees to adapt and a strong dose of humanity.

    It's not easy to talk with teens about their relationship with screens.{#blank#}1{#/blank#}

    Open with a discussion of young children's tech use

    Rather than asking teens to put down iPads, introduce a discussion on babies' tech use. {#blank#}2{#/blank#}When I had my eighth graders read an article about banning iPads for children under two, the class were interested.

    Admit your tech problems

    One of my students wrote that she would like to prevent the whole family from using tech facilities. Clearly, someone in her home was having some tech use problems. {#blank#}3{#/blank#}We can't tell kids to put down their devices if we continue to use them.

Keep a balanced opinion

    We adults wouldn't be able to live in today's society without screens, so we shouldn't expect teenagers to do so either. {#blank#}4{#/blank#}It's improved our lives in many ways. Before we start talking about its challenges, we need to realize its opportunities, too.

    Deal with the topic like you would nutrition (营养)

    If children weren't making good food choices, we would never take their lunches away and make them stay hungry. We would teach them how to eat healthy and help them learn to set new habits: {#blank#}5{#/blank#}Instead of taking their devices away, we should help them keep a balance with technology.

A. The same should go for technology.

B. Technology isn't a bad habit to be got out of.

C. This will invite teens to talk about the subject.

D. Teens need face-to-face communication with adults.

E. One of teens' fears is that we'll take their devices away.

F. So we need to be open about our own tech habits as well.

G. Here are a few ways that will make the discussion easier and more productive.