Houses fall down. Trees fall over. Large holes form in the ground. Could Alaska be sinking? That's what some villagers in Alaska have been asking themselves recently and scientists think they know why. Warmer temperatures may be causing Alaska's frozen ground to thaw (解冻).

    About 85 percent of Alaska's land surface has permafrost (永久冻结带). Permafrost supports the ground above it—including trees, houses, and roads. But why is the permafrost thawing?

    Some scientists say that human-caused pollution is leading to global warming. And most scientists agree that Alaska has been getting warmer. They say that the warmer temperature is causing permafrost to thaw in some areas. The thawing permafrost can cause problems for people, plants, and animals.

    The collapsing (倒塌) is a problem in the villages in Alaska which are built on permafrost, and some of them may have to move to safer ground, where there is no permafrost.

    The Alaskan town of Glennallen saw its old post office collapse. And, according to James Walters, a permafrost expert at the University of Northern Iowa, house-moving companies have been very busy.

    “Melting permafrost can also destroy trees and forests,” Walters said. “When holes in the ground form, trees fall into them and die. This could turn a forest into a swamp (沼泽), and animals which need the forests will have to move elsewhere.”

    “The melting could cause severe problems.” Walters says, “This could take hundreds of years, but in the end Alaska will look quite different from what it looks like now.”

    As you grow rapidly through your teenage years, you will experience a lot of changes. The changes may seem difficult. {#blank#}1{#/blank#} Don't panic! You will deal successfully with them! You are a young adult now!

    With more responsibility, you will find more freedom to make your own choices. This is a time to be well informed about making choices. In this way you can make healthy balanced decisions. {#blank#}2{#/blank#}You may already know your career path or you may have no idea at all what you want to do. Both situations are fine! Work hard and the right opportunity will present itself to you.

    Young adulthood means greater freedom and more choices. {#blank#}3{#/blank#}But try not to shut your family out of your life. You should learn to think of others even though you are old enough to look after yourself.

    It is also perfectly natural at this time for you to spend more time with your friends than your family. {#blank#}4{#/blank#} A true friend will stand by you no matter what happens.

    This period is a part of the life cycle. There are some people who will be with you throughout life's journey. There will be some people with whom you part and go separate way. Leaving school can be hard. The reality is that you may not even see all of your classmates again.

    You are a young adult. It is your life. No one can live it for you. {#blank#}5{#/blank#} So making the right choices will be important to you. Life is for living. Enjoy your life wisely!

A. Choose your friends wisely

B. They will help shape the future

C. They may seem to happen quickly

D. You will probably want to be independent

E. You may appreciate what you have in your own life

F. The choices that you make from now on will be your choices

G. Your family has been with you since you came into this world

    As I enter my 40s, I've noticed many of my parents' generation think social networking is something they are simply unable to understand. They fear that, should they try, they will somehow get it wrong; they will say the wrong thing, do the wrong thing or behave in a way that causes embarrassment(尴尬). But here's the first secret of social media: Everyone feels this way.

    I recently met a young actor who was complaining that her work demands that she join Microblog, but she always feels like she doesn't have anything smart to say. It's the same resistance (抵制)I hear from the older generation, who, however, have somehow believed that age is the barrier(障碍), rather than the differences of personal taste.

    Here's the second secret of social media: everybody uses it for more or less the same reasons. Older generations often sign up to stay in touch with children and relatives. We talk about this kind of communication like it's some old-fashioned activity, but it is exactly why younger people use social media. The truth is that most people use social media to gently keep an eye on one another, to see how those they care about are doing without needing to ring them up on the phone every night.

    And this is the last secret of social media: everyone gets to use them in their own way. Newcomers—younger and older—who worry about “getting it right” are thinking that there's a right way to get them. But actually there isn't. Personally, I talk a lot on Microblog. And some people post nothing and they use social media every day as readers. Social media companies would rather see people decorating their networks with pictures and posts, but there's no rule against being a fly on the wall. It's also a fine way to get involved.

    We're quick to forget that the web wasn't invented by 13-year-olds; it was created by today's seniors. I'd never try forcing those with no interest in social networks to use Microblog. But don't let the talk of age divides put you off. There's nothing to stop the older generation from joining in the network their own generation created.

    In the coming months, we are bringing together artists from all over the globe, to enjoy speaking Shakespeare's plays in their own language, in our Globe, within the architecture Shakespeare wrote for. Please come and join us.

National Theatre of China   Beijing Chinese

    This great occasion(盛会) will be the National Theatre of China's first visit to the UK. The company's productions show the new face of 21st century Chinese theatre. This production of

    Shakespeare's Richard III will be directed by the National's Associate Director，Wang Xiaoying.

    Date & Time Saturday 28 April, 2.30 pm & Sunday 29 April, 1.30 pm & 6.30pm

Marjanishvili Theatre Tbilisi | Georgian

    One of the most famous theatres in Georgia, the Marjanishvili, founded in 1928,appears regularly at theatre festivals all over the world. This new production of   It is helmed（指导）by the company's Artistic Director Levan Tsuladze.

    Date & Time Friday 18May,2.30pm & Saturday 19May,7.30pm

Deafinitely Theatre  London | British Sign  Language （BSL）

    By translating the rich and humorous text of Love's Labour's Lost into the physical language of BSL, Deafinitely Theatre creates a new interpretation of Shakespeare's comedy and aims to build a bridge between deaf and hearing worlds by performing to both groups as one audience.

    Date & Time Tuesday 22 May,2.30pm & Wednesday 23 May,7.30pm

Habima National Theatre Tel Aviv | Hebrew

    The Habima is the centre of Hebrew-language theatre worldwide ,Founded in Moscow after the 1905 revolution, the company eventually settled in Tel Aviv in the late 1920s,Since 1958, z& they have been recognised as the national theatre of Israel .This production of Shakespeare's The Merchant of Venice marks their first visit to the UK.

    Date & Time Monday 28May, 7.30 & Tuesday 29 May,7.30pm

    Thirteen-year-old Kaylee has a lot of friends—532, actually, if you count up both her Instagram followers and Facebook friends. And she spends a lot of time with them.

    But is it possible that Kaylee's online friendships could be making her lonely? That's what some experts believe Connecting online is a great way to stay in touch, they say. However, some experts worry that many kids are so busy connecting online that they might be missing out on true friendships.

    Could this be true? During your parents' childhoods, connecting with friends usually means spending time with them in the flesh. Kids played Scrabble around a table, not Words With Friends on their phones. When friends missed each other, they picked up the telephone. Friends might even write letters to each other.

    Today, most communication takes place online. A typical teen sends 2,000 texts a month and spends more than 44 hours per week in front of a screen. Much of his time is spent on social media platforms like Instagram and Facebook.

    In fact, in many ways, online communication can make friend ships stronger, “There's definitely positive influence. Kids can stay in constant contact, which means they can share more of their feelings with each other,” says Katie, co-author of the App Generation.

    Other experts, however, warn that too much online communication can get in the way of forming deep friendships. “If we are constantly checking in with our virtual worlds, we will have little time for our real world friendships.” says Rosen, a professor at California State University.

    Rosen also worries that today s kids might mistake the “friends” on the social media for true friends in life. However, in tough times, you didn't need someone to like your picture or share your tweet. You needed someone who would keep your secrets and hold your hand. You would like to talk face to face.

Below is a list of women who changed the world when they were young girls and teens.

Mary Shelley

English author Mary Shelley was just 18 years old when she wrote Frankenstein, which many credit as the origin of science fiction. Thus, Shelley has been called "the teenage girl who invented science fiction."

Alexandra Scott

Alexandra Scott was diagnosed with a form of cancer shortly before her first birthday. When she was just 4 years old, she set up her first lemonade stand in her front yard to raise money for childhood cancer research. Inspired by her story, people around the world set up their own lemonade stands to raise money for her cause. By the time she died in 2004, she had raised SI million. Her family continues her legacy (遗志) through Alex's Lemonade Stand Foundation.

Yuanyuan Tan

Chinese ballet dancer Yuanyuan Tan started representing her country in international competitions as a young teen. At 17, she became the youngest ever principal dancer at the San Francisco Ballet, as well as the first Chinese dancer to earn that title in a major Western company. She gives talks around the world, inspiring young dancers to follow their artistic dreams.

Bindi Irwin

Bindi Irwin carried on her father Steve Irwin's conservation legacy following his death in 2006. When she was 8 years old, she launched "Bindi the Jungle Girl" to encourage more kids to get interested in animals and wildlife conservation. She has continued to make TV appearances, published books and furthered her father's causes.