Grammar is the system of a language. People sometimes describe grammar as the “rules” of a language; but in fact no language has rules. If we use the word “rules”, we suggest that somebody created the rules first and then spoke the language, like a new game. But languages did not start like that. Languages started by people making sounds which evolved (逐渐发展成) into words, phrases and sentences. No commonly-spoken language is fixed. All languages change over time. What we call “grammar” is simply a reflection (反映) of a language at a particular time.

    Do we need to study grammar to learn a language? The short answer is “no”. Very many people in the world speak their own, native language without having studied its grammar. Children start to speak before they even know the word“grammar”. But if you are serious about learning a foreign language, the long answer is “yes, grammar can help you to learn a language more quickly and more efficiently.” It's important to think of grammar as something that can help you, like a friend. When you understand the grammar (or system) of a language, you can understand many things yourself, without having to ask a teacher or look in a book.

So think of grammar as something good, something positive, something that you can use to find your way—like a signpost(路标) or a map.

    Except invented languages like Esperanto（世界语）. And if Esperanto were widely spoken, its rules would soon be very different.

阅读理解。阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。

    F . Scott Fitzgerald, born on September 24,1896, an American novelist, w  as once a student of St.Paul Academy, the Newman School and attended Princeton. University for a short while. In 1917 he joined the army and was posted in Alabama, where he met his future wife Zelda Sayre. Then he had to make some money to impress her.

    His life with her was full of great happiness, as he wrote in his diary :“ My own happiness in the past often approached such joy that I could share it even with the person dearest to me but had to walk it away in quiet streets and take down parts of it in my diary.”

    This side of paradise, his first novel, was published in 1920. encouraged by its success, Fitzgerald began to devote more time to his writing. Then he continued with the novel the Beautiful and Damned (1922), a collection of short stories Thales of the Jazz Age (1922), and a play The Vegetable (1923). But his greatest success was The Great Gatsby, published in 1925,which quick brought him praise from the literary world. Yet it failed to give him the needed financial security. Then, in 1926, he published another collection lf short stories All the Sad Young Men.

    However, Fitzgerald's problems with his wife Zelda affected his writing. During the 1920s he tried to reorder his life, but failed. By 1930, his wife had her first breakdown and went to a Swiss clinic. During this period he completed novels Tender Is the Night in 1934 and The love of the last Tycoon in 1940. while his wife was in hospital in the United States, he got totally addicted to alcohol. Sheila Graham, his dear friend, helped him fight his alcoholism.

    Mayor Day called me that morning, his voice full of an urgency I'd never heard before. "These Chinese big people are coming to our town and I need you to prepare something really special for them. I'm relying on you, Adrian. The whole town is. This could be just the thing to put us over the top."

    "Okay, I'm on it," I said. I'm a caterer (酒席承办人), and for years I've done all the mayor's events for Thomasville, Alabama, our little town of 4,099. He likes everything I make, but I knew exactly what he wanted this time, banana pudding, his favorite.

    It's my mama's recipe. It was her desserts that she was known for. Mama cooked her banana pudding on the stove. Hers was thick and cream-colored, not dark yellow like the other ladies made. I remember practicing in the kitchen when I was a young girl. Mama showed me how to make banana pudding properly. "Good job, Adrian," Mama would say. I was so proud when I finally got mine just right, the way she did.

    For months Mayor Day had tried his best to persuade some Chinese businessmen who ran a copper company to build their new plant in Thomasville, but our little town didn't have the land they needed. "We are leaning toward Houston or Lamar," the company representative told Mayor Day. "There is nothing personal, just business."

    "Wait! What about Wilcox County?" the mayor asked. Wilcox, just east of us, was one of the poorest counties in the entire United States and had got plenty of land. There hadn't been any kind of plant built there since the 1970s.

    "But that's not your county," the company representative said. "Why are you lobbying (游说) for them?"

    "Because if you build in Wilcox County their economy will grow and so will Thomasville's. Besides, there's something to be said for loving your neighbor, isn't there?"

    The representative agreed to visit Wilcox County before the final decision was made. All the top leaders would come and have lunch in Thomasville, lunch that I cooked. And for dessert, the dish the mayor hoped would sweeten the deal. Banana pudding with 300 jobs riding on it, I knew it had to be perfect, like Mama's.

    The luncheon was held at the Thomasville Civic Center. Next to each plate I'd placed a little cup of pudding. I looked on anxiously as the Chinese businessmen eyed the dessert. Were they curious or sickening? One of the men pointed at his cup and said something to the translator. I couldn't hear his answer but the businessman still looked puzzled. He took a spoon, inserted it into the pudding, then put barely a taste to his lips. For a moment there was no reaction. Then he smiled, a grin that went from ear to ear. The rest of the businessmen started eating their pudding, one bite after another. In seconds all the cups were empty.

    One of the businessmen looked toward me and said something to the translator, who waved me over to the table. "Excuse me," he said. "Is there more? More …" he searched for the word, "… pie?" I brought out all the banana pudding. Even last cup was finished. By the time the men put down their dessert spoons they'd reached an agreement. They needed to know more about Wilcox County. There would be another meeting, another lunch.

    "And we will have again the banana pie?" one of the leaders asked.

    Mayor Day didn't miss a beat. "Absolutely," he said. "Adrian's lunches always come with banana pie."

    And a few months later, when it was announced that the plant would be built in Wilcox County instead of Houston, everyone joked that the decision had come down to one thing. Mama's been away for a few years now, but I like to think she's up in heaven, looking down on that new copper plant going up in Wilcox County, and saying, "Good job, Adrian."

    It was an autumn day, and 1 was standing in the kitchen, hanging my head over the counter and trying to figure out how many calories were in a bowl of homemade yogurt and fruit. And I felt annoyed.

    I was 16, and my best friend and I had gone to our first Weight Watchers meeting. It was the trend in the mid-1980s, and even though I was an athlete, like many teen girls, I didn't necessarily like what I saw in the mirror. But after a week or so of recording every meal and snack and calculating the calories, I had had enough. I went back to my routine of chowing whatever I wanted, running and skiing, and let that be that. And it's still pretty much what I do; as long as the workouts are regular and the food is whole and balanced, my body's set point hasn't varied for years.

    The weight loss trend of three decades ago−full of scales and counting calories−has fallen away. Now fasting is popular. The ways to keep fit vary: on the 5:2 diet a person eats for five days and fasts for two days each week, while the 18:6 refers 10 fasting for 18 hours and then eating within a six-hour window each day.

    In this issue, Associate Editor Mark Barna tries to understand the science behind the fasting plans. Researchers have found that animals like monkeys age more slowly after years of eating less, and in the lab in humans, they saw improvements in a number of signs that indicate risk of some hard to cure diseases. The hope for healthy weight loss isn't over yet, but at least now the calculators don't have to be out at every meal.

    When I was a boy, my parents and I traveled from New York City to the Pennsylvania countryside for a weeklong taste of rural life. We stayed in a guesthouse on a farm, joining the daily routines and eating meals with the farmer and his family. We got up early to see the cows as they were milked. I even tried my hand at milking one, and then joined the farmer as he released the cows into the field afterward.

    Decades later I still have vivid memories of that trip which made me realize the value of a vacation, of seeing new things, meeting new people and sharing memorable experiences with family members. To this day, I still consider that family trip when I plan to take time off with my wife and kids. Vacations are a time for resting and connecting. As a bank manager, I spend much of my workday encouraging my customers to save their money. One of the reasons I give is that we should all have enough for a family vacation every year. In our busy lives, family is what we should be saving our money and time for.

    For my family, our vacation starts when we begin planning the trip. We talk about destinations and our budget (预算) ahead of time. Among the things we discuss: Can we save money by renting a house instead of spending six nights in a hotel? Would it be better to buy groceries and cook for ourselves rather than eat out every night? Involving (使参与) the kids in planning the vacation makes sure that they have a great vacation too. I prefer to visit historical sites and museums while they love to fish and swim. So I build in some relaxation time for us all so that the vacation can work for everyone.

    Each year, setting aside vacation time to spend together is especially important to us. A relaxing environment opens the doors to all kinds of conversations—deep, silly or meaningful. There's no pleasure from the usual everyday tasks. What matters is that everyone is having a great time.

    Alison Malmon was ending her freshman year at the University of Pennsylvania. US, when she got the news: Her older brother Brian, a student at Columbia University; was suffering from mental illness.

    Inspired by this, Malmon formed a group at her university to organize students to talk openly about mental health. It soon blossomed into a national organization that today has more than 450 campus chapters. Leaders with the organization spend their time talking with college students about the pressure that today's young people face.

    "What you hear often is just a need to be perfect," said Malmon, "and a need to present oneself as perfect." A new study in the UK proved that this need for perfectionism is simply part of today's society. In the study, two researchers studied more than 40,000 students from the US, Canada, and the UK. They found that what they called "socially-prescribed (社会定向型的) perfectionism" increased by a third between 1989 and 2016.

    Lead researcher Thomas Curran said that while so many of today's young people try to present a perfect appearance online, social media isn't the only reason behind this trend. Instead, he said, it may be driven by competition in modem society, meaning young people can't avoid being sorted and ranked in both education and employment. That comes from new normal situation like greater numbers of college students, national examination and parenting that increasingly emphasizes success in education.

    For example, in 1976, half of high school seniors expected to get a college degree of some kind. By 2008, more than 80 percent expected the same. The researchers also said changes in parenting styles over the last two decades might have had an impact. As parents feel increased pressure to raise successful children, they in turn pass their "achievement anxieties" onto their kids through "too much participation in their child's activities or emotions

    Those in the mental health community like Malmon say they're concerned about the impact the culture of perfectionism has on mental health on campuses. "Mental health has truly become this generation's social justice (公正)issue," she said. "It's our job to equip them with the tools and to let people know that it's not their fault."