In 1977, a dead author of detective stories saved the life of a 19-month-old baby in a most {#blank#}1{#/blank#}(usual) way. The author was Agatha Christie, one of the most successful writers of detective stories in the world.

    In June that year, a baby girl became {#blank#}2{#/blank#}(serious) ill in Qatar, near Saudi Arabia. Doctors were unable to find out the cause of her illness with {#blank#}3{#/blank#}(confident), so she was sent to big hospital in London {#blank#}4{#/blank#}specialist help was available. A team of doctors hurried to examine the baby only {#blank#}5{#/blank#}(discover) that they, too, were confused by the very unusual disease. Just then, a nurse asked to speak to them.

     "Excuse me," said the nurse, "{#blank#}6{#/blank#} I think the baby is suffering from thallium(铊) poisoning. "

    "What makes you think that?" Dr. Brown asked. "Thallium poisoning is extremely rare."

"I read a detective novel {#blank#}7{#/blank#} Agatha Christie a few days ago,” the nurse explained, "and in the book, somebody suffers from thallium poisoning, and all the symptoms {#blank#}8{#/blank#}(describe). They're exactly {#blank#}9{#/blank#} same as the baby's."

    The tests showed that the baby had indeed been poisoned by thallium, a rare metallic substance{#blank#}10{#/blank#} (use) in making special glass. Once they knew the cause of the illness, the doctors were able to give the baby the correct treatment. She soon recovered and was sent back home.

    In the United States, there were 222 people {#blank#}1{#/blank#}（report）to be billionaires（亿万富翁）in 2003. The {#blank#}2{#/blank#}（rich）of these is Bill Gates, worth at least $ 41 billion, who made his money{#blank#}3{#/blank#}starting the company Microsoft. Mr. Gates was only 21 years old{#blank#}4{#/blank#}he first helped{#blank#}5{#/blank#}（set up）the company in 1976. He was a billionaire by then. {#blank#}6{#/blank#}, there are still some other people who have made lots of money at even {#blank#}7{#/blank#}（young）ages. Other young people who have {#blank#}8{#/blank#}（strike）it rich include Jackie Cogan and Shirley Temple. Both of these child actors made over a million dollars {#blank#}9{#/blank#}（act）in movies before they were 14. But   the youngest billionaire is Albert von Thurn und Taxis of Germany, who, in 2001, inherited（继承）a billion dollars when he {#blank#}10{#/blank#}（turn）18!

    Chinese brush calligraphy or “shufa” in Chinese is one of{#blank#}1{#/blank#} most important art forms in China. Many Asian cultures have originated their own calligraphy styles, but China's is unequaled because of {#blank#}2{#/blank#}(it) beauty, grace (优雅), and history.

    The {#blank#}3{#/blank#} (origin) of Chinese brush calligraphy are unknown, but local tales say it goes back over 4,000 years to the time of the legendary (传说的) Yellow Emperor (2698-2598 B.C.). At that time characters were carved on animal bones or tortoise shells. Only after Emperor Qin Shi Huang united China under his rule {#blank#}4{#/blank#} one country did it really gain popularity as a common art form.

    He simplified Chinese characters and regular rules were set,{#blank#}5{#/blank#} (make) it easier for people to learn and master. This Chinese art form continued to progress and during the Tang Dynasty (618-907 AD) a new type of cursive script (草书) was formed and standardized. It is written {#blank#}6{#/blank#}(free), but it's not as easy to read.

    Today Chinese calligraphy is once again a subject in schools and an art form highly {#blank#}7{#/blank#}(appreciate) across the world. Anyone can practice it and{#blank#}8{#/blank#} is required is a simple set including: brush, ink, and paper. It's fun for amateurs to try, but to become good at it, not only years of practice but natural talent {#blank#}9{#/blank#} (need). Practising this art consistently can develop personal character and is of {#blank#}10{#/blank#} (benefit) to health.

    Should naps(小睡) actually {#blank#}1{#/blank#} (take) during the day? Well, we certainly know from {#blank#}2{#/blank#} (evident) in the sleep center and that of many other scientists that naps can give you benefits for both your brain {#blank#}3{#/blank#} your body. But naps can actually be {#blank#}4{#/blank#} double-edged sword because while we're awake during the day, we're building up sleepiness or sleep pressure. So when you try to fall asleep at night, you'll fall asleep quickly and then you'll stay asleep. And when we sleep, we actually release that sleepiness so that we wake up the next morning feeling {#blank#}5{#/blank#} (refresh).

    So if you take a nap during the day, especially if you take it too late in the afternoon, you will actually release some of that sleepiness and it will make it much {#blank#}6{#/blank#} (hard) to fall asleep and stay asleep soundly throughout the night. So the advice would be if you don't struggle with your sleep and you can nap{#blank#}7{#/blank#} (regular), then naps are just fine.

    But if you do find it difficult {#blank#}8{#/blank#} (fall) asleep or stay asleep at night, then you should avoid naps and try to build up that healthy sleepiness in the evening.

    The ideal nap depends on {#blank#}9{#/blank#} you want from that nap. Different stages of sleep actually give you different types of brain and body  {#blank#}10{#/blank#} (benefit).

On May 29,2021,a documentary film called One Day When We Were Younginvited 16 alumni(校友)—all famous scholars—{#blank#}1{#/blank#}(share) their stories about the National Southwest Associated University. It {#blank#}2{#/blank#}(bear) when Japan invaded northern China in 1937. To save their educational and intellectual heritage {#blank#}3{#/blank#} the Japanese invasion, the remaining students and faculty at Peking University, Tsinghua University and Nankai University first retreated to Changsha in Hunan Province, and {#blank#}4{#/blank#}(late) headed south toward Kunming in Yunnan Province. The three universities joined together as the National Southwest Associated University, {#blank#}5{#/blank#} was also known as Xinan Lianda in Chinese.

Xinan Lianda had 5 colleges and 26 departments, with 179 professors. Students there could have a higher education {#blank#}6{#/blank#}(base) in large part on the American model. It sought to provide general education and {#blank#}7{#/blank#}(academy) freedom.

Though Xinan Lianda is {#blank#}8{#/blank#}(physical) gone and each school moved back to its original home in 1946, the experience of studying there had {#blank#}9{#/blank#} everlasting impact on students.

"The National Southwest Associated University set a good example for contemporary Chinese universities, and there are many treasured {#blank#}10{#/blank#}(legacy) for us to inherit, to cherish, and to share," Li Zhong, vice-president of the university's Beijing alumni association, told the Global Times.