2 . Feeling stressed out and over-loaded? Try smiling. According to recent studies, smiling has the power to reduce stress and increase our ability to deal with hard situations.    1    . It also can force us to breathe deeper, resulting in a calmer outlook and increased ability to deal with problems.

Smiling tends to produce chemicals. When you smile, even when you force it, your body releases the “feel good” hormones and endorphins (安多芬)，which will put you in a much better mood and relieve stress. Endorphins interact mainly with receptors (接收器) in cells found in regions of the brain responsible for blocking pain and controlling emotion.     2    

Smiling can improve your physical health. Your body is more relaxed when you smile.    3    . In addition to making you look more attractive, successful and approachable, smiling may also protect you from the common cold. According to recent data， smiling can help boost the immune system by decreasing stress levels, which in turn increases white blood cell count and releases beneficial antibodies that help fight infection and disease.

    4    . It is rare to smile when reading a funny passage from a book on our own, but when that same passage is read out loud to us, or even if other people are in the room，most people are likely to smile then. Have you ever been around someone who seemed to be smiling all the time? Chances are，you found yourself smiling as well. This is because smiling is incredibly infectious.     5    . So, next time you're feeling down, seek out your happiest friend and let the smiles begin.

3 . Quan Hongchan was born in the city of Zhanjiang in China's Southeast Guangdong Province. She______diving at the age of 7. In 2018, she joined the Guangdong Diving Team,______three years there before ______the national team at the end of 2020.

He Weiyi is a diving coach at the Guangdong Diving Team. Quan was under the______of He for 3 years. Up on the 10-meter-high diving platform, Coach He says this is where Quan showed her talents,______expectations despite her young _______.

But Coach He says talent alone doesn't______success. For Quan, hard work has been the ______. As for her big win at the Olympics, coach He says there were challenges along the way. He says she's only fourteen and that the Olympic medal is a(n)______foundation. But he hopes Quan can make full use of her physical______, and continue on the road of______.

It looks high up the platform, but believe it or not, in just three years' time, Quan could______ some very difficult sets of movements. She was______able to do some______men's movements. Her development was much quicker than most______. Audiences admitted she's got______ talent.

Quan practices harder than other athletes around her age. She's the most______. She asked the coach______whether her positions and flights were OK, whether she did well. She'd get unhappy if he couldn't answer her______ . Young as she is, her spirit is a______for perfection.

4 . Starting your morning with a good cup of coffee can be a great way to get an energy boost. But besides helping you get over your sleepiness, it turns out it might also be boosting your brain, too. A study out of the Krembil Brain Institute has found that drinking your coffee a certain way can actually reduce your risk of developing Alzheimer’s disease (阿尔茨海默氏症).

“Coffee consumption does seem to have some relation to a decreased risk of developing Alzheimer’s,” Donald Weaver, the study‘s co-author, said. “But we wanted to investigate which compounds (化合物) are involved and how they may affect age-related cognitive decline.”

The research was set out to investigate the connection between coffee consumption and a decreased risk of Alzheimer. The researchers decided to test the compounds found in different beans, including light roast, dark roast, and decaffeinated (无咖啡因的) coffee. The team discovered the beans contained phenylindanes, a chemical compound that prevents the buildup of proteins, known as beta-amyloid and tau, which are known to lead to Alzheimer’s. Since a longer roast leads to an increase in the amount of phenylindanes, the researchers concluded that dark roast coffee provided better protection against the Alzheimer’s.

The team also discovered levels of phenylindanes were as strong in dark roasted decaffeinated coffee as they were in a regular caffeinated dark roast. “The caffeinated and de-caffeinated dark roast both had identical function in our initial experimental tests,” Ross Mancini, one of the scientists, said in a statement. “So we observed early on that its protective effect could not be due to caffeine.”

“It’s the first time someone has investigated how phenylindanes interact with the proteins that are responsible for Alzheimer’s,” Mancini acknowledged that the findings show more research is needed. “The next step would be to investigate how beneficial these compounds are, and whether they have the ability to enter the bloodstream or cross the blood-brain barrier.”

5 . In August 2018, Yo-Yo Ma began a two-year journey to perform solo cello(大提琴) in 36 locations around the world. The project is motivated not only by his six-decade relationship with Bach’s music, but also by Bach’s ability to speak to our shared humanity at a time when our civil conversation is so often focused on culture division.

Bach’s 300-hundred-year-old music is one extraordinary example of how culture connects us and can help us to imagine and build a better future. For Ma, culture includes not just the arts, but everything that helps us to understand our environment, each other, and ourselves, from music and literature to science and food. The Bach Project explores and celebrates all the ways that culture makes us stronger as individuals, as communities, as a society, and as a planet.

“Bach’s music has been my constant musical companions. For almost six decades, they have given me support, comfort, and joy during times of stress, celebration, and loss. What power does this music possess that even today, after three hundred years? Does it continue to help us navigate through troubled times?” Ma said in a conference. He is more convinced than ever of the Bach’s music has the ability to create shared meaning that extends far beyond the here and now. “Over the years,” writes Ma, “I came to believe that, in creating these works, Bach played the part of a musician-scientist, expressing precise observations about nature and human nature.”

In the next few years, Ma will play cello across six continents, in familiar and unlikely locations. Accompanying each performance will be events that seek to put culture in action by bringing people and organizations together to address present social issues.

Language is the best approach to    1    ( understand) a country. We know that language is a bridge for people to communicate. Chinese is one of the most beautiful languages in the world as well as    2    most-spoken one.

The beauty of Chinese language lies in its form, structure and rhythm. Every sound, stroke, word and sentence have their own stories. In the process of learning Chinese，I hope you will learn to appreciate the Chinese language and its profound cultural heritage. Some foreign friends say that Chinese is difficult    3    ( learn). It shows that those who learn Chinese have great courage and    4    ( wise).

Only after learning Chinese will you know the meaning    5    ( contain) in the Chinese characters. For example, the Chinese character “人”which means “people” consists    6     two supporting strokes, showing people need to support each other. The Chinese character “大”which means “big or great” is like the Chinese character“人”opening arms. This means people opening arms are of great vision. The Chinese character“天”is like “人”standing against the sky. That’s the reason    7    it has the meaning of “sky”. The Chinese character“信”means “trust”. Its left side is “人” and the right side “言” which means “words”. When the two parts    8    ( put) together, it means people keeping their words win trust. You can understand the philosophy at first glance.

There are many    9    ( example) like this. There is no other language in the world that can create so much beauty with just two thousand    10    ( common) used characters. When you try to learn Chinese，you will feel China, understand China better, and even fall in love with China.

Seventy-one-year-old retired judge, Leon,    1    (drive) his car one day last March when he had a sudden heart attack. He later learned that someone had offered him first-aid    2    (treat). Soon after he recovered, Leon was    3    (determine) to give thanks to whoever saved him.

    4    (search) the record that someone had called 911 that day, Leon found that he was saved by a lady named Susie Powell. “I was on my way to the office when I saw    5    (he) curl up (蜷缩) in his seat,” recalled Powell. Luckily for Leon, Powell had just completed a course on first aid. She immediately applied her first-aid knowledge    6    practice. She called 911. Then she got him out of the car and laid him    7     (mild) on his back.

Two weeks after the incident, the two met for lunch. Leon told Powell about his different     8    (interest). When Leon asked    9    he could do to thank her, Powell said he didn’t need to do anything. However,    10    idea came into Leon’s mind. He would sponsor (赞助) a poor child’s education in Powell’s name.