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It is a question people have been asking for ages—is there a way to turn back the aging process in people? 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. They include growth, reproduction and the way we process food.

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

What are stem cells? 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.

“Aging speed is controlled, can be controlled by a particular place in the body, which is the hypothalamus. And it can be controlled by a particular type of cells, which are hypothalamus stem cells.” He adds that when the hypothalamus starts aging, so does the body. “So 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 in 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 of the animals’ muscles. They also studied the social behavior and cognitive (认知的) ability of the mice. The researchers say the results show that the treatment slowed aging in the animals.

“When we injected the hypothalamus stem cells, which were derived from young mice, we injected them to the middle-aged mice and that was, in fact, to slow down aging. So the mouse aged slowly and they also have increased their lifespan, which is longevity.”

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 human beings. “If we can translate what we have seen in animals to humans, I think humans, they can function better during later ages, later stage of aging.”

Cai and his team say their studies may have other benefits. They say the findings could lead to new ways to help doctors identify and treat any number of age-related health issues.

Emma loves to listen to her brother Jake play his guitar. He is 15 years old and has been playing guitar 1．he was 4 years old. He practices every day, and he is really good. He plays country music   and rock. There       2．(be) some songs that he plays really well.

Emma likes   3．country songs best. She really likes watching Jake play his guitar and hearing     the country sounds that       4．(create) by Jake. Emma wants to take lessons so that she can play by        5．(she). “Mom, can I take guitar lessons?” Emma asks. Her mom replies, “It takes a lot of hard work to play the songs          6．Jake plays; are you sure you have enough time to put into practicing?”

Thinking about all of her favorite     7．(activity), Emma isn't sure. She loves her ballet classes,   her art classes and her chess club. Emma realizes that if she wants to play guitar, she will   8．(probable) have to quit another activity to make time for practicing. She does not know which activity to give       9．because they all mean so much to her.

在深圳经济特区成立四十周年之际，某报社将举办一场主题为“发现深圳之美”的宣传活动。假如你是某校初三学生王华，请结合自己的实际经历，给全校同学分享你所发现的深圳之美，并表达自己作为一名深圳中学生的自豪之情。

要点：1.   自然之美：深圳自然景点，例如莲花山,……

2.人文之美：义工活动，读书月活动,......

3.自己发现的深圳之美

要求：1.   词数 80-100 词（开头已给出，不计入总词数）

2.要点齐全，可适当发挥。

3.条理清晰，语句通顺，意义连贯，书写规范整洁。

4.文中不得出现真实姓名和校名。

参考词汇：自然风光 natural scenery； 人文之美 beauty of humanity； 深圳读书月 Shenzhen Reading Month

The Beauty of Shenzhen

Shenzhen, a young city, attracts lots of people to travel and live here.________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

“Do you feel bored at home? So does the virus. I know you all want to go out for vacation. But if you stay longer, the virus will be bored to death.”

This is how Zhang Wenhong asked people to stay indoors during the COVID-19 outbreak (爆发). He works at Huashan Hospital in Shanghai. These days, Zhang becomes an Internet celebrity (网红) because of his funny and honest way of talking.

The 52-year-old doctor believes in the traditional Chinese idea that “the best doctors prevent (阻止) the disease (疾病)”. That’s why he tries his best to spread scientific knowledge on how to prevent the disease. He and his team also write a lot of articles on Wechat every day to tell people something about the latest COVID-19. One of his articles got more than 10 million likes.

But Zhang does not care about how famous he is. He just cares about how to be a good doctor in all his life.

因为疫情的原因，你肯定很久没去度假，但你一定有过难忘的愉快的假期。假如你是李铭，请你用英语写一篇短文，向Jerry讲述一个你难忘的、愉快的假期。内容包括：

I am so glad to know about your unforgettable trip.

Yours,

Li Ming

When people are old, most of them just take care of their grandchildren or play chess in a park. 1．, Wang Deshun is not the same. Wang Deshun, 2． 85-year-old man, is from a rural (农村的) family in Shenyang, Liaoning province. He has a lot of challenging (有挑战性的) things to do. He is widely known 3． China’s “hottest grandpa” because he not only showed himself as a male model in his late 70s but also got a pilot’s license in his eighties. Everybody 4． one question for Wang: How does he keep so young? He says it’s simple. He exercises 5． his mind and body. Every morning he exercises his brain by 6． books and newspapers. And each afternoon he swims at 7． an hour.

He sets a good 8． for everyone. Age should not be an excuse for us not to do things. As 9． as we have hopes and dreams, we can make it no matter how old we are. Wang is always trying his best to make his dream come 10．.