We all know what a brain is. A doctor will tell you that the brain is the organ of the body in the head. It controls our body's functions, movements, emotions and thoughts. But a brain can mean so much more.

    A brain can also simply be a smart person. If a person is called brainy, he is smart and intelligent. If a family has many children but one of them is super smart, you could say, “He's the brains in the family.” And if you are the brains behind something, you are responsible for developing or organizing something. For example, Bill Gates is the brains behind Microsoft.

    Brain trust is a group of experts who give advice. Word experts say the phrase “brain trust” became popular when Franklin D. Roosevelt first ran for president in 1932. Several professors gave him advice on social and political issues（问题）facing the U.S. These professors were called his “brain trust”.

    These ways we use the word “brain” all make sense. But other ways we use the word are not so easy to understand. For example, to understand the next brain expression, you first need to know the word “drain”. As a verb, to drain means to remove something by letting it flew away. So a brain drain may sound like a disease where the brain flows out the ears. But, brain drain is when a country's most educated people leave their countries to live in another. The brains are, sort of, draining out of the country.

    However, if people are responsible for a great idea, you could say they brainstormed it. Here, brainstorm is not an act of weather. It is a process of thinking creatively about a complex topic. For example, business leaders may use brainstorming to create new products, and government leaders may brainstorm to solve problems.

    If people are brainwashed, it does not mean their brains are nice and clean. To brainwash means to make some accept new beliefs by using repeated pressure in a forceful or tricky way. Keep in mind that brainwash is never used in a positive way.

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。

    If the crust (外壳) of the earth were not pretty solid (坚固的), it would be shaking about and moving up and down frequently. However, there are places in the rocks of the earth's crust where it isn't strongly held together—where faults exist. Along the faults, one rock might push against another with great force. The energy is changed to vibration in the rocks, so they begin to shake and we have an earthquake!

    The most famous one in North America was the San Francisco earthquake of 1906. Seven hundred people died and property (财产) damage amounted to about $425,000,000.The greatest destruction came from the fires that followed the quake.

    One of the most famous earthquakes in Europe took place in Lisbon, Portugal, in 1755. The city was destroyed and at least thirty thousand people were killed. In 1908, in Calabria and Sicily, a quake killed about seventy­five thousand people. In 1915, in central Italy, hundreds of towns and villages were damaged and thirty thousand people were killed.

    Two great earthquakes that caused great damage in Asia took place in Tokyo, Japan, and in Gansu Province in China. The Tokyo quake of 1923 killed more than one hundred thousand people and destroyed the city and the city of Yokohama, too. The Chinese quake in 1920 covered more than three hundred square miles and killed about two hundred thousand people.

    Overheated property markets in major cities have started to cool down after authorities took measures against speculative buying and a potential home market bubble. However, a long-term effort is needed to make the market stable and sustainable, analysts said.

    Last month, new home prices dropped in seven cities, compared with six in September, according to the National Bureau of Statistics, which monitors housing prices in 70 cities nationwide. In Shenzhen, where housing prices rocketed by more than 30 percent in the past several months, prices declined by 0.5 percent in October.

    “After first-tier cities and some key second-tier cities launched cooling measures, home prices have obviously become stable,”Liu Juanwei, NBS senior statistician, wrote in a note posted on the NBS website.

    Beijing, Tianjin, Shanghai, Xiamen and Zhengzhou began to see home prices switching from rising to dropping in the second half of October, with average prices down by between 0.1 percent and 0.4 percent compared with the first half of the month, he noted.

    Housing authorities in more than 20 cities have launched various measures against speculative buying to curb rapid home price growth, including setting stricter requirements for qualified buyers and limits on buying second and third homes.

    Yan Yuejin, an analyst with property research agency E-House China R&D Institute, said the residential property market is “digesting these policies and measures gradually, and it is likely for the market to have rational and stable prices in the near future.”

    Ma Junwei, an analyst with Deyi Realty in Shanghai, said it will require a long-term effort by regulators and local authorities to battle speculative buying while keeping supplies stable for buyers with solid demand, including those who plan to buy their first home or upgrade their housing.

    In Shanghai, real estate agents said that they have noticed that homebuyers have become more rational. “Buyers are starting to take their time and study their options. They will compare prices, designs and locations and bargain with sales representatives,”said Luo Dingjun, sales manager at Jinyu Property Marketing.“This was not the case two months ago, when they rushed to buy for fear that if they hesitated, prices would grow too fast and they would no longer be able to afford. ”

    It's very common these days for people to take some sort of regular exercise each week. But if you've never done it before, what's the best way to go about it? {#blank#}1{#/blank#} He or she will create a personalized plan for you based on your aims.

    However, each hourly session can be steep considering you have to pay both the personal trainer and membership of the gym, too. So what's left? Well, if you have the courage to do it, you can make your own plan. It's relatively easy to do if you have the know-how. {#blank#}2{#/blank#}

    First, keep your fitness goal in mind. Are you looking to slim down or increase your abilities? Whatever it is, make sure the things you choose to do are achieving that goal. Next, do your research. {#blank#}3{#/blank#} Watch as many of these as possible, but make sure to be a little critical of them — everyone has a different physique and what works for one may not work for another. Finally, keep your feet on the ground. {#blank#}4{#/blank#} It takes at least three months to see any realistic body changes. And don't be overzealous(过度热衷的) — never work in pain — a good workout is difficult and challenging, but never painful. Pain means you are damaging yourself.

    If nothing else, focus on calisthenics (健身操). {#blank#}5{#/blank#} Do as many of one exercise as you can without stopping, and then try and repeat that number twice more — make sure you sweat, and don't forget to rest for a minute in between each activity!

A. Be patient with yourself and set realistic goals.

B. But before you do, here are some basic pointers.

C. Well, many people make use of a personal trainer.

D. They just don't want to design their own workout plan.

E. These days, social media is full of fitness videos and advice.

F. Find a way to make each exercise more difficult as you get in shape.

G. These are the basic body movements which everyone can do anywhere.

    Parents often believe that they have a good relationship with their teenagers. But last summer, Joanna and Henry noticed a change in their older son. Suddenly he seemed to be talking far more to his friends than to his parents. "The door to his room is always shut." Joanna noted.

    Tina and Mark noticed similar changes in their 14-year-old daughter. "She used to sit in my arms on the sofa and talk with me," said Mark. "Now we joke that she does this only when she wants something. Sometimes she wants to be treated like a little girl and sometimes like a young lady. The problem is figuring out which time is which."

    Before age 11, children like to tell their parents what's on their minds. "In fact, parents are first on the list." said Michael Riera, author of Uncommon Sense for Parents with Teenagers. "This completely changes during the teen years." Riera explained. "They talk to their friends first, then maybe their teachers, and their parents last."

    Parents who know what's going on in their teenagers' lives are in the best position to help them. To break down the wall of silence, parents should create chances to understand what their children want to say, and try to find ways to talk and write to them. And they must give their children a mental (思想的) break, for children also need freedom, though young. Another thing parents should remember is that to be a friend, not a manager, with their children is a better way to know them.

    Over the past 40 years, China has helped more than 700 million rural residents out of being poor, and the poverty rate -- the proportion of people living below the Chinese poverty line -- had fallen among the rural population from 97.5 percent in 1978 to 3.1 percent at the end of 2017, official figures shows. China's achievements in poverty alleviation (扶贫) made the world look at China with admiration.

    "For me, it is unbelievable that over 40 years, that is, over the course of one working lifetime, China has gone from one of the poorest countries in the world to one that is about to eliminate(消除) absolute poverty," said Craig Allen, president of the US-China Business Council.

    Varaprasad Sekhar Dolla, a professor of Chinese studies at India's Jawaharlal Nehru University, also spoke highly of China's achievements in poverty reduction. "If global poverty came down greatly in the last three or four decades, it's partly because of the Chinese contribution to reducing poverty within its own national boundaries," said the Indian scholar.

    In the eyes of Khairy Tourk, a professor of economics with the Stuart School of Business at the Illinois Institute of Technology in Chicago, "many countries look up to China to learn from its experience." "The Chinese experience is based on building a modern infrastructure (基础设施) and then on setting up special economic zones that would help underdeveloped countries to become more industrial," he added.

    In the government work report delivered at the opening of the annual NPC session (全国人大会议) on March 5, China promises to reduce its population of rural poor by over 10 million this year.