阅读下列短文：从每题所给的 A、B、C、D 四个选项中，选出最佳选项，将正确的选项涂在答题卡上。

Is there link between humans and climate change or not? This question was first studied in the early 1900s. Since then,many scientists have thought that our actions do make a difference. In 1997,the Kyoto Protocol explained our role in the Earth's changing atmosphere and set international limits for gas emissions(排放) from 2008to 2012. Some countries have decided to continue these reductions until 2020. More recently, the Paris Agreement, stuck by nearly 200 countries, also aims tolimit global warming. But just now how much warmer it will get depends on how deeply countries cut carbon emissions.

    My mother is a hard-working and kind woman. She is very busy from morning till night. As a teacher, she works hard.{#blank#}1{#/blank#} Both my brother and I love her dearly as she loves us.

    My mother has been teaching math at a middle school in my hometown. She goes to work early in the morning and does not return home until late in the afternoon.{#blank#}2{#/blank#} She treats them with patience and teaches them well. For her excellent quality and very good teaching results, she has been elected as a model teacher several times.

    {#blank#}3{#/blank#} Every day, when she comes back home from work, she sets about doing housework, sweeping the living room and bedrooms or cleaning the furniture, and putting everything in good order. She seems to be busy all the time. As she has been very busy working every day, she looks older than her age. But she looks as cheerful and happy as ever. Mother never buys expensive dresses for herself, but she often buys some inexpensive but high quality clothes for us.{#blank#}4{#/blank#} She just eats a plain meal outside when she is too busy to cook herself. She lives a busy yet simple life, without any complaints.

    Often she says to us, “work while you work, and play while you play. That is the way to be happy and gay. If you do not work, you will become lazy and be of no use to society”. What a piece of good advice this is! {#blank#}5{#/blank#} This advice of hers will always serve as a guide to my behavior. My mother is great indeed, and I always feel proud of her.

A. She enjoys listening to classic music.

B. As a mother, she takes good care of us and gives us every comfort.

C. She loves her students and cares for them.

D. She never goes to expensive restaurants to enjoy meals.

E. My mother is hard-working and never wastes money.

F. I never forget it and always bear it in my mind.

G. Can you tell us something about your mother?

    Music is an international language. The songs that are sung or played by instruments are beautiful to all people everywhere.

    Popular music in America is what every student likes. Students carry small radios with earphones and listen to music before class, after class and at lunch. Students with cars buy large speakers and play the music loudly as they drive on the street.

    Adult drivers listen to music on the car radio as they drive to work. They also listen to the news about sports, the weather, politics, and activities of the American people. But most of the radio broadcast is music.

    Pop or popular music singers make much money. They make a CD or tape which radio stations use in every state. Once the popular singer is heard throughout the country, young people buy his or her tapes. Some of the money from these tapes comes to the singer. Wherever the singer goes, all the young people want to meet him or her. Now the singer has become a national star.

    Besides pop music, there are two other kinds of music that is important to Americans. One is called folk music. It tells stories about the common life of Americans. The other is called western or country music. This was started by cowboys who would sing at night to the cows they were watching. Today, any music about country life and the love between a country boy and his girl is called western or country music.

    Summer's here and it won't be long before school-aged kids across America start complaining that they're tired of riding their bikes, playing at the park, swimming in the pool...and all the other awesome activities their parents hoped would keep them pleasant for the next 10 weeks. Well, if it's any comfort, such rapid boredom could suggest that the kids have amazing powers of memory. A new study shows that the better your short-term memory is, the faster you fed sated (过饱的）and decide you've had enough.

    "Though satiation can be physical, like when you feel full after eating too much, we were interested in the psychological (心理学的）side of satiation. Like when you're just tired of something," Noelle Nelson, assistant professor of marketing and consumer behavior. She and her colleague Joseph Redden at the University of Minnesota tried to think outside the lunch box." Something that was interesting to me is that some people get tired of same things at very different speeds. So if you think about pop songs on the radio, some people must still be enjoying them and requesting them even after hearing them a lot. But a lot of other people are really sick of those same songs."

    The difference, the researchers thought, might have to do with memories of past experiences. For example, studies show that people push away from the dinner table sooner when they're asked to describe in detail what they ate earlier for lunch.

    So the researchers tested the memory capacity (能力） of college students, The students then viewed a repeating series of three classic paintings…like The Starry Night, American Gothic, and The Scream...or listened and re-listened to a series of three pop songs...or three pieces of classical music. Throughout the test, the students were asked to rate （定等级） their experience from zero to tan. And the better a participant scored in the memory test, the faster they got bored." We found that people with larger capacities remembered more about the music or art, which led to them getting tired of the music or art more quickly. So remembering more details actually made the students feel like they'd experienced the music or art more often."

    The findings suggest that marketers could control our desire for their products by figuring out ways to keep us from fully remembering our experiences. We could also trick ourselves into eating less junk food by putting ourselves in the memory of a previous (之前的) snack. As for kids easily bored, just tell them to forget about it—it might help them have more fun.

    Wood has many great characteristics that make it the perfect building material. It is cheap, durable, easily available, and most importantly, environmentally sustainable. The one thing it is not, is transparent! Now thanks to a team of scientists at Stockholm's KTH Royal Institute of Technology the material may even be able to add that feature to its already impressive list.

    Lead researcher Dr, Lars Berglund said he was inspired to create the transparent wood after learning how Japanese researchers had developed a see-through paper for use in flexible display screens for electronic devices. The team began by pulling out the wood's lignin(木质素). The lignin-free wood was then dipped into a polymer(聚合物)and baked at a temperature of 158°F for four hours. The result was a hybrid product that was not only stronger and lighter than the original wood but also, almost transparent. The researchers were able to adjust the level of transparency by varying the amount of the polymer injected and also by changing the thickness of the wood.

    While scientists have previously created a see-through wood for small-scale applications like computer chips, the transparent wood is the first one being considered for large scale applications. The researchers, who revealed their findings in Biomacromolecules on April 11, picture using the transparent wood in buildings to allow for more natural light, or to create windows that let in the desired amount of light without sacrificing privacy.

    Wood that allows light to pass through could lead to a brighter future for homes and buildings. Berglund also thinks the wood could play a significant role in the design of solar panels. The semitransparent material would be able to keep light longer and give it more time to interact with the conductor, thus resulting in better solar efficiency. Additionally, substituting the currently used glass with this new product would help solar energy manufacturers improve their carbon footprint and lower the cost. They are now experimenting with ways to scale up the manufacturing process so that the transparent material is cost-effective to make and easy to use.

    The Earth is facing a climate crisis, but it's also getting greener and leafier. According to new research, the rise is largely due to China and India.

    A study by National Aeronautics and Space Administration (NASA), based on extensive satellite photographs and published in the journal Nature Sustainability, has revealed that the two countries with the world's biggest populations are also responsible for the largest increase in greenness.

    Since 2000, the planet's green leaf area has increased by 5 percent, or over 2 million square miles. That's an area equivalent to the sum total of the Amazon rainforests, NASA says. But researchers stressed that the new greenery does not neutralize deforestation and its negative impacts on ecosystems elsewhere.

    A third of the leaf increase is thanks to China and India, due to the implementation of major tree-planting projects alongside a vast increase in agriculture.

    Using the data from a NASA sensor, researchers discovered that China is the source of a quarter of the increase in green leaf area, despite possessing only 6.6 percent of the world's vegetated area (植被区). Forests account for 42 percent of that increase, while croplands make up a further 32 percent. China's increase in forest area is the result of forest preservation and expansion programs, NASA said, established to fight against the impacts of climate change, air pollution and soil erosion (水土流失). India has contributed a further 6.8 percent rise in green leaf area, with 82 percent from croplands and 4.4 percent from forests.

    Rama Nemani, a co-author of the study and a researcher at NASA's Ames Research Center, said in a statement, "When the greening of the Earth was first observed, we thought it was due to a warmer, wetter climate and fertilization from the added carbon dioxide in the atmosphere, leading to more leaf growth in northern forests, for instance." "Now, with the data that lets us understand the phenomenon at really small scales, we see that humans are also contributing," Nemani said. "This will help scientists make better predictions about the behavior of different Earth systems, which will help countries make better decisions about how and when to take action."

    Thomas Pugh, a professor at the University of Birmingham's School of Geography, Earth and Environmental Sciences, said the NASA report expands scientists' understanding of the causes behind global greening. But he also cautioned that a direct line cannot be drawn between an increase in global greening and a decrease in negative impacts of climate change.