Language learning begins with listening. Children are greatly different in the amount of listening they do before they start speaking, and later starters are often long listeners. Most children will “obey” spoken instructions some time before they can speak, though the word “obey” is hardly accurate as a description of the eager and delighted cooperation usually shown by the child. Before they can speak, many children will also ask questions by gesture and by making questioning noises.

    Any attempt to study the development from the noises babies make to their first spoken words leads to considerable difficulties. It is agreed that they enjoy making noises, and that during the first few months one or two noises sort themselves as particularly expressive as delight, pain, friendliness, and so on. But since these can't be said to show the baby's intention to communicate, they can hardly be regarded as early forms of language. It is agreed, too, that from about three months they play with sounds for enjoyment, and that by six months they are able to add new words to their store. This self-imitation leads on to deliberate imitation of sounds made or words spoken to them by other people. The problem then arises as to the point at which one can say that these imitations can be considered as speech.

    It is a problem we need to get our teeth into. The meaning of a word depends on what a particular person means by it in a particular situation and it is clear that what a child means by a word will change as he gains more experience of the world. Thus the use at seven months of “mama” as a greeting for his mother cannot be dismissed as a meaningless sound simply because he also uses it at other times for his father, his dog, or anything else he likes. Playful and meaningless imitation of what other people say continues after the child has begun to speak for himself. I doubt, however, whether anything is gained when parents take advantage of this ability in an attempt to teach new sounds.

    From the loss of wildlife to rising sea levels, we're all well aware of the problems that climate change could cause.

    But while it may seem like such issues won't affect most of us directly，it looks like future generations could grow up without something that many of us now take for granted: chocolate.

    According to an essay published by the US National Oceanic and Atmospheric Administration, changes to the climate in the regions that produce cacao - the plant from which chocolate is produced - may mean that it will soon become extinct.

    Most of the world's cacao grows in countries close to the equator，with over half of it growing in the African nations of Ghana and Ivory Coast.

It's predicted that by 2050, climate change will have accelerated the rate at which temperatures in these countries rise, making it extremely difficult for cacao to grow there.

    The problem doesn't lie in increased heat, however，but in lower humidity (湿度)，as it's believed that rainfall will stay at the same level if the temperature rises.

    “In other words, as higher temperatures squeeze more water out of soil and plants, it's unlikely that rainfall will increase enough to offset the moisture (含水量) loss,” Michon Scott, the essay's author, wrote.

    To help fight this problem, researchers from Berkeley University in the US are working on changing the DNA of cacao plants to allow them to survive in dryer conditions by using gene editing technology, according to US News.

    In the meantime, US company Mars, one of the world's biggest manufacturers of chocolate products, announced in January that it would spend $1 billion to help reduce the effects of climate change.

    “This is a world issue, and it requires everyone to work together,” Mars spokesperson Barry Parkin told Business Insider.

    The message here is that if we all do our part, we may be able to prevent some of the worst impacts of climate change. Or if we're unlucky, chocolate will become a thing of the past.

    I was ten when I first sat with my grandmother behind the cashier (收银台) in her general store. {#blank#}1{#/blank#} I quickly learned the importance of treating customers politely and saying "thank you. "

    At first I was paid in candy. {#blank#}2{#/blank#} I worked every day after school, and during the summer and on weekends and holidays from 8 a. m. to 7 p. m. My father helped me set up a bank account. {#blank#}3{#/blank#}

    By the time I was 12, my grandmother thought I had done such a good job that she promoted me to selling cosmetics (化妆品). I developed the ability to look customers directly in the eye. Even though I was just a kid, women would ask me such things as "What color do you think I should wear?" I took a real interest in their questions and was able to translate what they wanted into makeup (化妆) ideas. {#blank#}4{#/blank#}

    The job taught me a valuable lesson: to be a successful salesperson, you didn't need to be a Rocket scientist—you needed to be a great listener. {#blank#}5{#/blank#} Expect they are no longer women purchasing cosmetics from me; instead, they are kids who tell me which toys they would like to see designed and developed.

A. Later I received 50 cents an hour.

B. Before long, she let me sit there by myself.

C. I ended my selling a record amount of cosmetics.

D. Today I still carry that lesson with me: I listen to customers.

E. My grandma's trust taught me how to handle responsibility.

F. Soon I found myself looking more beautiful than ever before.

G. Watching my money grow was more rewarding than anything I could have bought.

    When you're a junior in high school, three little letters quickly become larger than life: SAT.

    At the start of my junior year, I realized that the environment was packed with competition. Surprisingly, this pressure didn't come from adults. It came from the other students. Everyone in my grade had college on the brain. To get into the college of our choice, we all believed, we had to outcompete and outscore everyone else with less sleep, because time for sleeping was time you didn't spend studying for the SAT.

    I let myself get swept up in the pressure. My new motto was, if I wasn't in every single honor level class, I wasn't doing enough. I was bad-tempered and I couldn't focus. I stopped talking to my friends and my mom, and I couldn't figure out who I was. I didn't have the confidence to know that my own passions and unique skills were what would make me stand out to colleges.

That's when I realized: I am not my SAT score. Trying to stick to what I thought colleges wanted masked who I really am. I decided to rely on my strengths and get away from the crazy pressure I was putting on myself.

    Instead of forcing myself into higher levels of math, I took on an extra history class. I learned how to love what I was doing and not what I thought I was supposed to do. I learned to shine as an individual, not a faceless member of the crowd. And I found that not only was this better for my happiness, but it also made me more effective and efficient when I studied.

    To me, individuality means having the confidence to decide who I am and who I want to be, and a number on a page is never going to change that. I am more sure of myself, and more ready to apply for college, than ever.

    What is the single most effective way to reduce greenhouse-gas emissions? Go vegetarian (素食)？ Replant the Amazon? Cycle to work? None of the above. The answer is: make air-conditioners better. On one calculation, replacing refrigerants (制冷剂) damaging the atmosphere would reduce total greenhouse gases equaling 90bn tonnes of CO₂ by 2050. Making the units more energy-efficient could double that. By contrast, if half the world's population gave up meat, it would save 66bn tonnes. Replanting two-thirds of tropical forests would save 61 bn tonnes. A one-third increase in global bicycle journeys, just 2.3bn tonnes.

    Air-conditioning is one of the world's great overlooked industries. Automobiles and air-conditioners were invented at roughly the same time, and both have had a huge impact on where people live and Work. Unlike cars, though， air-conditioners have drawn little criticism for their social impact, emissions or energy efficiency. Most hot countries do not have rules to govern their energy use. There is not even a common English word for “coolth” (the opposite of warmth).

    Yet air-conditioning has done more than most things to benefit humankind. Lee Kuan Yew, the first prime minister of Singapore, called it “perhaps one of the signal inventions of history”. It has transformed productivity in the tropics(热带地区)and helped turn southern China into the workshop of the World. In Europe, its spread has pushed down heat-related deaths to 10% since 2003, Men 70,000 people than usual, most of them elderly, died in a heatwave. For children, air-conditioned classrooms are associated with better grades at school.

    Environmentalists who call air-conditioning “a luxury we cannot afford” have half a point, however. In the next ten years, as many air-conditioners will be installed(安装)around the world as were put in between 1902(invention time)and 2005.Unless energy can be produced without carbon emissions, these extra machines will warm the world. At the moment, therefore, air-conditioners create a vicious cycle. The more the Earth warms, the more people need them. But the more there are, the warmer the world will be.

    Cutting the impact of cooling requires three things. First, air-conditioners must become much more efficient. The most energy-efficient models on the market today consume only about one-third as much electricity as average ones, Minimum energy-performance standards need to be raised raised, orintroduced in countries that lack them altogether, to push the average unit's performance closer to the standard of the best.

    Next, manufacturers should stop using damaging refrigerants. One type called hydrofluoro-carbons, is over 1,000 times worse than carbon dioxide when it comes to trapping heat in the atmosphere. An international agreement to knock out these pollutants will come into force in 2019.

    Last, more could be done to design offices, malls and even cities so they do not need as many air-conditioners in the first place. More buildings should be built with overhanging roofs or balconies for shade, or with natural ventilation (自然通风).Simply painting roofs white can help keep temperatures down. Providing indoor air-conditioned comfort need not come at the expense of an overheating world.

The language Centers first Trivia Night tested students' knowledge on different languages and their histories last Friday at Douglass commons.

"We have decided to conduct this event when the weather is bad so that students who have nowhere to go and stay on campus can come and find a comfortable shelter during a cold winter day," Language Center Director, Teresa Valdez said. According to Valdez, the idea for Trivia night came a year ago from a junior and team-member called Elizabeth de Los Reyes. The event engaged students' interest in languages and showed the high-quality services that the Language Center provides.

Participants competed in small groups that each represented a different language and country. There were five teams in total: Russia, China, Japan, Spain and France. The competition consisted of four rounds with each round consisting of three questions relating to the following topics literature, language, geography, culture and history.

After a few warm-up questions about how people greet each other in different languages, what continent Turkey is found in, and who is the first man to fly to the moon, the questions became increasingly difficult. Each round offered an increasing amount of points a team could receive. The final question was worth 20 points. If a team did not answer it correctly, the points were taken from the total.

In the meantime, students enjoyed pizza, snacks, and drinks while sharing their linguistic (语言的) interest. Most of the participants knew two or three languages. Others knew more, such as first-year Bartek Jezierski from Poland, who can speak English, Polish, German, Spanish, and Russian.

The winners from first to third place were France, Japan and Russia respectively. All five teams were given some prizes—a blue shopping bag, a cup and stuffed toys. However, students believed the most important prize of the evening was the process of the competition—how students from diverse backgrounds and cultures were able to participate in a friendly competition, and shared their mutual (相互的) love of languages.