Oxford is a city in the UK. It's in the west of the UK and it's famous for the University of Oxford. It's an old university--about 900 years old. It has a longer history than Cambridge University. It's the oldest university in the English speaking world.

    There are about 21,000 students and they are from all over the world. Many students go to school by bike. There are 38 colleges in the University of Oxford, but Cambridge University has only 31 colleges. There are 104 libraries in the University of Oxford. Bodleian Library is the second largest library in the UK. Stephen Hawking was a student of the University of Oxford. He's a great scientist. Clinton, the 42nd American President, was also a student of the university.

    Today, with the development of society, people all over the world almost have the same hobbies That is to say, we are not very different in some way. However, cultures are still quite different. In the East and in the West, social rules are not the same.

    In the East, it takes a long time to become someone's friend. People are very close to their friends. When people from the West meet you, they will call you a friend right away. That doesn't mean they are close to you.

    When people from the East meet you, they want to know about your age, your salary (薪水) and whether you are married or not. For people from the West, these are not polite questions. They think such kind of questions violates their privacy (隐私).

    Family is important for everyone. However, in the East, kids live with their parents for a long time. They still listen to them after they grow up.

    In the West, independence is very important. After their kids grow up, they leave home. They don't have to listen to their parents.

    In the East and in the West, people think differently, too. People in the West think less and act more. In the East, people notice relationships between things, and they often keep their opinions quiet.

Have you even seen fireflies(萤火虫)?Fireflies are small insects. You can't see them{#blank#}1{#/blank#} any season except summer. The lights made by fireflies are probably one of the most magical things to see on a summer night. Do you wonder{#blank#}2{#/blank#} fireflies make this light?

There is a part that can make light under a firefly's stomach. Fireflies take in air and{#blank#}3{#/blank#}

(useful) it to produce light with special cells (细胞).Different kinds have {#blank#}4{#/blank#}(they) own special flash patterns, just like humans have different languages. They use these flash patterns to find other members of their group.

Fireflies {#blank#}5{#/blank#}(main) use the light to get friends' attention. The males (雄性) fly around while{#blank#}6{#/blank#}(turn) their lights on and off, hoping to get the attention of a female (雌性).They try to flash very quickly, because the {#blank#}7{#/blank#}(fast) males flash, the more attention they can get from females. Fireflies also use the light to make their {#blank#}8{#/blank#}(enemy) scared.

If you haven't seen many fireflies lately, you are not alone.{#blank#}9{#/blank#} number of fireflies may be dropping because of some reasons, such as light pollution and chemical medicine use. Another important reason is that fireflies' living places are destroyed by humans.{#blank#}10{#/blank#}(luck), Chinese scientists recently found three new firefly kinds in Yunnan. Yunnan might have the right environment for these magical insects to live in.

Circles can be found everywhere in the natural world, but with no exact way to measure (测量) thc. They are very mysterious (神秘的) and might never be completely understood. When you take the distance around a circle and divide it by the distance across a circle, you will always get Pi. While Pi is about 3. 14 when round ed, it is endlessly long. With the help of computers, mathematicians (数学家) have been able to work Pi out to over a trillion decimal places (小数点后万亿位). This makes Pi mysterious, even to the most famous mathematicians.

Pi Day is celebrated on March 14, since the way we write this date, 3/14, looks just like Pi when rounded. In 2009, U.S. Congress voted to formally make March 14 Pi Day. Certain parts of the world — places where March 14 is written as 14/3 — will instead celebrate Pi Approximation Day which takes place on July 22nd because of the division (除法) result of 22/7.

Pi has appeared in movies, comics, music, and more. "In modern movies, any time the filmmaker wants to create a sense of mystery, the  symbol Pi is used," says Blatner. People also love working to remember the digits ( 数 位 ) of Pi and competing against  others to  see who can remember most. The Guinness World Record for remembering the most digits  of Pi is  held by  Lu  Chao  of China, who successfully remembered Pi to nearly 67,000 decimal places.

Above all, Pi Day is about having fun with the number, according to Blatner. People will celebrate Pi Day by eating pie and throwing pie, and with fun Pi-related games. Princeton, New Jersey holds a series of Pi-related festivities. Events this year include a surprise birthday party for Albert Einstein whose birthday also falls on March 14, and a "Walk a Pi Event" where participants will walk 3. 14 miles together. Just like the number itself, the possibilities for Pi Day are truly endless.

March 20 is a special day. It's the International Day of Happiness! The United Nations (UN) made this day to remind everyone that being happy is important.

{#blank#}1{#/blank#}Leaders of the country wanted to know how happy its people were. So, they created the Gross National Happiness (GNH) Index ( 国民幸福指数 ) and did its first GNH survey ( 民意调查 ) in2008 to measure the happiness of its people .

Bhutan's interest in happiness caught the world's attention. Then the UN agreed in 2012 to create the International Day of Happiness.{#blank#}2{#/blank#}

People get joy from many things like friends, family, good health and a clean environment.

Every year on March 20, the World Happiness Report comes out to show what makes people happy and how happy people are in different countries around the world.

Maher Nasser from the UN helped make the International Day of Happiness.{#blank#}3{#/blank#}"I want to make every day an International Day of Happiness," he said.

Nasser thinks that governments can help by making their people happier and healthier. But it's not just up to governments. {#blank#}4{#/blank#}For- example, helping others can make us feel good about ourselves and that makes us happier.

The International Day of Happiness is more than just a happy day. It's about making a better world together .

What else can you do to make yourself happy? (15词以内) {#blank#}5{#/blank#}