Welcome to our school. You can do a lot of things here. Come and join us.

    Before you were my teacher, I thought that teaching was the last thing I wanted to do. Why would someone want to come in every day and attempt to instruct students, many of whom couldn't care less, or to get paid very little compared with the work he or she put in?

    You may have thought that the only thing I was learning from you was the course, but that's not all l learned. From reference books to funny jokes, you made each class exciting. You always tried to make class charming so that we could be excited about learning. However, those days have gone by.

    Whenever I was confused and needed extra help, you were the exact one to turn to. I would walk into your room for help and there would be several kids. You ran from one student to the next helping each one through their confusion. You could have gone back home after the bell rang. Instead, you chose to Stay and care about what your students did.

    You didn't only care about my learning, but you also cared about other things I was involved in. At the beginning of the year, we wrote down our hobbies and interests. You remembered what we wrote, too. I had missed class for track meets (田径运动会)and when I came back the next day, you would ask me how it went. Many of the teachers never bothered to ask what I liked to do.

    These things showed me the value of teaching. They showed me how much of an influence a teacher can have on a student. I want to be the one that influences students and pushes them toward success. I want students to leave my classroom thinking that their time was worthwhile (值得的). I want to be the inspiration for them that you were for me. Whenever it gets hard for me to continue on this path, I'll remember you and what you did for me.

    There's been a lot of talking about white-and-blue collar workers, and you may have even heard of gold collar workers, but lately a new color of collar is making its way into China's urban vernacular(土话)—green. Green collars say no when work is life and life is work. They choose to get out of the fast lane(车道), and explore new ways of living "green".

    Living green doesn't mean someone is working as an environmentalist, biologist or scientist. Instead it is more of a lifestyle choice. A typical green collar is well educated like a white-collar but physically tough like a blue-collar, likely born in the 70s or 80s of the last century and living in one of China's big cities, with a monthly income well above 5,000 yuan(about US $700).

    The life of a green collar may go something like this: Turn off the mobile phone after work, eat only healthy food rich in vitamins, go on hikes every weekend, and like to help the underprivileged.

    Green collars even have their own club. In Beijing, the Green Collar Club is for people who share a "be happy, healthy and helpful" spirit. The club often holds charity parties and uses the donations for environmental protection and poverty relief(摆脱贫困) projects in China.

    "They are successful in their careers, but do not miss the pleasures in life. They have a lot of money, but do not fall slave to it." said Zuo Shiguang, one of the founding members of the club.

    A smile will tell people around you that you are a kind and friendly person. However, many people don't smile because they think they have ugly teeth. For example, one of my classmates, Mike, doesn't have very nice teeth, so that is why he seldom opens his mouth. He even says that he has lost confidence because of his teeth. So it is very important for us to look after our teeth. In fact, a lot of people have this problem. Some people inherit tooth problems from their parents, while others' teeth are damaged because of bad habits, like heavy smoking, eating too much sugar or not brushing teeth often. If your teeth are in bad shape, you should see a dentist and ask for help. They can help improve your teeth and tell you how to take care of them.

    Smiling can help you feel more confident and make people think of you as a more friendly person. If you want to keep healthy, you should not only smile but also laugh. An Indian doctor called Kataria said that young children should laugh about 30 times a day, while adults should laugh between 7 and 15 times a day. So please take this chance to smile and laugh now.

One of the tallest wooden buildings in Europe, a 98m timber mixture skyscraper, is to rise in Berlin.

The 29-storey WoHo Tower, to be designed by a firm of Norwegian architects, is intended to be a "light-house project" for low-carbon construction, towering over Potsdamer Platz and the Landwehr Canal.

Its core, including lifts and a staircase, is to be built around a steel-reinforced concrete structure but the rest of the building, including flats, offices, cafes and a kindergarten, will be fashioned down wooden beams and panels.

"As Norwegians, we are used to working a lot with timber," Nicolai Riise, CEO of the Mad Architects' Practice said.

"The thing about timber is that it demonstrates sustainability from top to bottom. The carbon footprint is close to zero and it's a fantastic material to build with. If you look at this in a broader way, it's one of the ways we are going to be able to beat the climate crisis."

Wooden skyscrapers, once regarded as an unprofitable pipe dream, have become a realistic prospect with the coming of cross-laminated building techniques and more flexible planning laws. Because these structures' parts are fit with care, they can be far lighter than their concrete equivalents and are thought to be relatively resistant to fire. A cubic meter of wood can also take an estimated ton of carbon dioxide out of the atmosphere.

Larger wooden structures are planned elsewhere. London is examining blueprints for the 300-meter Oakwood Tower. A project in Tokyo could rise to 350m.

 "BANG!" I pulled the door heavily behind me. "Never set foot in this house again!" stormed father. I rushed out of the flat and ran along the street.

A young man who held a child in his arms walked past me. I felt as if I saw my childhood from another space: happy and carefree. But now...I don't know whether it is because I have grown up or because Dad is getting old. We differ in our ways of thinking. We are just like two people coming from two different worlds. It feels like there is an iron(铁制的) door between us that can never be opened.

I wandered in the streets, until I had only the street lights to keep me company. My heart was frozen on this hot summer night. When I finally reached the high-rise apartment block in which I lived, I saw that the light was still on.

I thought to myself, "Is Father waiting for his boy, or still angry with him?"

All the lights were off except Father's.

Dad was always like this. Maybe he didn't know how to express himself. After an argument he had the habit of tucking me underneath the covers(掖被子) while I was sleeping. This was how he always was. He had been a leader for so long that telling everyone else what to do had become his second nature.

The light was still on.

"Am I wrong?" I whispered, maybe... With the key in hand, I was as nervous as I had ever been. At last, I decided to open the door. As soon as I opened the door, tears ran down my cheeks. I suddenly realized that the iron door that I had imagined between us did not exist at all. Love——it's second to none.