3 . Spanish artist Pablo Picasso (1881—1973 ) was one of the greatest artists of the 20th century. It was said that everything his brush touched turned to gold. But in truth, his works could be worth more than any precious metal. Picasso created more than 20,000 works in his life, including two of the world's 10 most expensive paintings.

Between 1907 and 1913, Picasso and his colleague Georges Braque started a revolution(革命) in painting. Before that, paintings were like windows—they were painted to look as if they had depth. You could tell which objects were "close" to you and which objects were "far away". But Picasso and Braque didn't want to paint like that any more. To them, a painting wasn't a window to the world; it was marks and lines on a flat surface. Why, they thought, should an object like a guitar be shown only from one angle (角度)? A guitar can look very different depending on which angle one looks at it from. Their answer was to show all the angles. They broke the guitar up into pieces. Their style of painting is called cubism (立体主义).

But why did they feel such a need to change things? Well, the world around them was changing, too. Science was turning people's ideas upside down. Albert Einstein's theory proved that what we knew about time and space was wrong. The world was becoming different; artists needed to start seeing and painting it differently.

The famous and terrifying painting Guernica (1937) shows a terrible scene during the Spanish Civil War. In the painting, you can actually see the sky falling. Picasso couldn't have painted it without the skills he learned during his cubist period. Breaking a guitar up into pieces was his preparation for showing the world being blown to pieces.

Last Sunday I went to a animal hospital to help the doctors there. I arrived at the hospital early in the morning. And there were already much work to do: giving the pets food and water, and even giving them kisses on the heads.

At first, they looked at me with frightening eyes. A doctor says to them, "Don't worry, and everything will be OK." I washed a dog's hurt leg. I worked careful to make sure I didn't hurt him. I wished he could know we were just trying help him. It was a long day and the work made me tired, and I was very happy. I knew I loved animal. And the animals knew I loved him. They enjoyed about my care with love!

6 . Whether you are a new blogger, or one that has been blogging for a while, you are probably wondering how to make the best of your blog.     1     By doing so, you can get your blog known, promote a product and get the results you are expecting. Here are several ways to do this.

The first step is to make sure that your blog is updated frequently.     2     This will make a huge impact on your blog. Continue posting as you should as this is something that will keep attracting your readers to your blog.

    3     Having your own look is a huge plus in the blog marketing world. You can have your own look by just using HTML, and adjusting the code to suit your taste. You are going to see that this will truly make a difference with your blog.     4     Doing so will make it look even more professional.

Something else that will help you with your blog marketing is exchanging links with authority blogs that are in your same market. This is another great way to get the word out about your blog. The authority sites are listed high in Google’s search results.     5     You will need to continue to work on your blog and get more links to it all of the time. The more the better in this case. In the world of blogs, most blog owners are thankful for all links, and are willing to return the favor.

Remember that effective blog marketing requires persistence and patience. Just keep working on it. Your hard work is going to pay off and you will be glad that you did.

7 . It is a question people have been asking for ages. Is there a way to turn back the aging process?

For centuries, people have been looking for a “fountain of youth”. The idea is that if you find a magical fountain, and drink from its waters, you will not age.

Researchers in New York did not find an actual fountain of youth, but they may have found a way to turn back the aging process. It appears the answer may be hidden right between your eyes, in an area called the hypothalamus (下丘脑). The hypothalamus is part of your brain. It controls important activities within the body.

Researchers at New York’s Albert Einstein College of Medicine found that hypothalamus neural (神经的) stem cells also influence how fast aging takes place in the body.

What are stem cells(干细胞)? They are simple cells that can develop into specialized cells, like blood or skin cells. Stem cells can also repair damaged tissues and organs.

Dongsheng Cai is a professor at the Albert Einstein College of Medicine. He was the lead researcher in a study on aging in mice. He and his team reported their findings in the journal Nature, Cai explained when hypothalamus function is in decline, particularly the loss of hypothalamus stem cells, and this protection against the aging development is lost. it eventually leads to aging.

Using this information, the researchers began trying to activate, or energize, the hypothalamus laboratory mice. They did this by injecting the animals with stem cells, Later, the researchers examined tissues and tested for changes in behavior. They looked for changes in the strength and coordination (协调) of the animals muscles. They also studied the social behavior and cognitive ability of the mice. The researchers say the results show that the treatment slowed aging in the animals, Cai says injecting middle-aged mice with stem cells from younger mice helped the older animals live longer.

But these results were just from studying mice in a laboratory. If the mice can live longer, does that mean people could have longer lives? The next step is to see if the anti-aging effects also work in.

8 . Do you like running enough to make it a habit? Temey Wolfgram does; she has made running a lifelong career and isn’t stopping.

In February, the 16-year-old from Woodbury High School, Minnesota, US, competed at the 2020 US Olympic Trials. She finished the marathon (42,J95 km) with a tune of 2:42:47 as the youngest competitor in the race and ranked 76th out of 390 runners.

Then, in November, Wolfgram, who turned 17, broke the Women's American Junior marathon record with her time of 2:31:49. The old record was 2:34:32, which had stood since 1984. During the run, Wolfgram once hit a wall pretty hard, but she overcame it to finish. ^“I guess I can say I gave it my all,” she told Runner's World. “When I finished, all I was thinking was that I was super happy,” Wolfgram said.

This was only her third marathon. In 2018, when Wolfgram was 15 years old, she ran her first marathon just because she wanted to see if she was capable of doing it. “I believed that I would get faster as the distances got longer... and I'm still glad that I did it.”

When preparing for that first marathon, she ran up to 120 miles （about 190 kilometers） per week. Although her parents didn't have any background in running, they helped Wolfgram train. At first, her dad would take her out in the morning and run about 13 miles. The distance would gradually increase each day. On top of her runs in the morning, she would do cross-country practice after school.

Next, Wolfgram will think about attending the Olympic Games in 2024 after it's scheduled.

Cities are diverse ecosystems, and a large number of species share our urban areas. As our city spreads, we need think about     1     it is like for other species to have human neighbors.

Because cities     2     (build) for humans, they do not always provide suitable habitats for wildlife. For example, most city parks are kept neat and tidy so that humans will find them     3     (pretty) than before. But when we cut grass or plant flowers, we destroy natural habitats.

When a bridge in Austin, Texas was repaired, engineers added small gaps running along the length of its bottom,     4     made a good home for bats, and soon the bridge was the home of thousands of bats. At first, people were afraid     5     the bats. Now, they have come to value     6     (they) winged neighbors. The bats are a tourist     7     (attract), and they eat lots of bugs every night.

There are also structures built with the objective of     8     (bring) wildlife into the city. The Beijing Olympic Forest Park is a good example. The park     9     (use) native plants and created open, natural spaces for wildlife. The result is a zone where over 160 species of birds can move about     10     (free). If we learn to share our space, we can become better neighbors to the wildlife around us.

Ladies and gentlemen,

I'm honored to stand here and present my speech.

Thanks for your listening!