If you are studying at school, do be a polite and clever student! There is no excuse for not doing your assignments. If you can't come to school, you should call your teacher or your classmate ask about homework. It is your responsibility to find out what homework you have missed. It is not the teacher's job to remind you of the missed assignments.

    You must not be absent on a test day. If you are seriously ill, call and let the teacher know you will not be there for the test. If your teacher allows a make-up test, you should take the test, again within one or two days after you return to class. Serious illness is the only reason for missing a test.

    Be on time! It is impolite to be late. Also, it bothers other students. If you must come in late, be sure to do it quietly. Have your books and papers out of your bag before you come into the classroom. Then go to your seat and sit down quietly. In the USA, it is not necessary to knock before you enter the classroom. Most teachers will give you a low grade if you are often late.

    In America, you should call your teacher by his or her last name instead of “teacher”. Also you should use Mr, Miss, Ms or Mrs before the last name (such as Mrs Smith or Mr Jones). The teacher will tell you the title that he or she likes. It is impolite in the USA to eat, drink or chew gum during class. Don't do these until the break. Also, removing your shoes in the classroom is not polite.

    There was great excitement on the planet of Venus (金星) this week. For the first time Venusian scientists managed to land a satellite on the planet Earth, and it has been sending back signals as well as photographs.

    The satellite was directed into an area known as Manhattan (曼哈顿). Because of excellent weather conditions and extremely strong signals, Venusian scientists were able to get valuable information about the feasibility of a manned flying saucer (飞碟) landing on Earth. A press conference was held at the Venus Institute of Technology.

“We have come to the conclusion, based on last week's satellite landing,” Professor Zog said, “that there is no life on Earth."

    “How do you know this?” the science reporter of the Venus Evening News asked.

    "For one thing, Earth's surface in the area of Manhattan consists of solid concrete (混泥土) and nothing can grow there. For another, the atmosphere is filled with carbon monoxide (一氧化碳) and other deadly gases and nobody could possibly breathe this air and survive.”

    “Are there any other sources of danger that you have discovered in your studies?”

    “Take a look at this photo. You see this dark black cloud staying over the surface of Earth? We don't know what it is made of, but it could give us a lot of trouble and we shall have to make further tests before we send a Venus Being there. Over here you will notice what seems to be a river, but the satellite findings indicates it is polluted and the water is unfit to drink.”

    “Sir, what are all those tiny black spots on the photographs?”

    “We're not certain. They seem to be metal objects that moves along certain roads. They give out gases, make noise and keep crashing into each other.”

    “Professor Zog, why are we spending billions and billions of Zilches to land a flying saucer on Earth when there is no life there?”

    “Because if we Venusians can learn to breathe in the Earth atmosphere, then we can live anywhere.”

    Australia is a developed country and the future of its solar industry is looking bright after a record 3.5m panels (嵌板) were installed on rooftops last year, giving the equal output of a medium-sized coal-fired power station. The record 1,057 MW of capacity (生产能力) in small-scale systems installed across the country broke the previous record set in 2012, figures from the Clean Energy Regulator showed on Tuesday.

    Australia's solar power prosperity could almost double capacity in a year. The data also revealed that the average system size has also doubled since then from three to six kilowatts as average prices continued to fall. A fully installed 5KW system costs an average of $5,930 in Australia, according to the energy broker Solarchoice. net. au. Its records show that the price has roughly halved in many capital cities since 2012.

    The regulator's executive general manager, Mark Williamson, said there was increasing interest in renewals as a way to take control of electricity bills. But more importantly, he said it was also good news for reducing carbon emissions.

    “We are seeing a wide cross-section of Australians-households, community centers, schools, and small businesses-receiving rewards under the small-scale renewable energy scheme,” Williamson said. “Our data shows consumers are embracing renewable energy to take control of their electricity bills.”

    In 2017, there was a 41% increase in installing renewable energy capacity across all states and territories compared to 2016. Queensland led the way with installed capacity at 295MW, with the Australian Capital Territory taking top place for the biggest annual increase by 57%. “The data collected by the Clean Energy Regulator in 2017 reflects the industry is going from strength to strength. It looks like 2018 will be another big year for the solar industry.”

    The total of installed capacity for last year is expected to rise to 1,070MW when all the data is collected. A large coal-fired power station such as Loyd Yang A in Victoria's Latrobe Valley has a capacity of 2,200MW.

    When you are sitting in class, have you ever drawn pictures in the margins (页边的空白处) of your notebooks? If so, you are doodling. Many people think of doodling as a distraction (分心) from more important things. But it might be just the opposite.

    One study shows that doodling may help you remember things you hear 29% more. Besides, doodling can help you think creatively. Walking away from a problem to draw might actually help you solve it. When you come back, you'll have a fresh perspective and figure out an answer more quickly.

    An author named Sunni Brown wrote a book on doodling. She argues that doodling is a tool that can help people think. In fact, she runs a business that helps companies improve organization and planning through doodling. Brown believes doodling is helpful because it includes many ways of learning. You learn in four ways: seeing, hearing, reading or writing, and through movement. The more ways you use, the better you learn. And when you doodle while listening to a lecture, you use all four.

    You might think that being good at drawing is important for doodling. But if the point of doodling is to help you think, then it doesn't matter what the picture looks like. Even if you're not an artist, doodling can help you. So next time you need help focusing, pick up a pen and doodle away!

                              Sworkit

Do want to stay fit in cold winter? Sworkit is here to help. It's good for people new to fitness, as well as those who don't have enough time to do other exercises. Once you download the app, you'll be asked to do a quiz so Sworkit can work out the best program and fitness plan for you. The app is free to download, but you'll need to pay a monthly fee to access most workouts. 

Peak

This app is all about keeping your mind sharp. It has over 45 short, interactive games and puzzles .When you open Peak for the first time, you'll get to set personal goals and choose what brain-related aspects you'd like to improve on. The app is free to download, but unless you buy the paid version.

Canva

This graphic(绘画的)design app, used by more than 150 million people, has 250,000 patterns and 1 million pictures for you to create posters, logos, and more. It can even make videos, and even websites. All you need to give is a written tip, and a design is created for you in seconds. The free version of the app offers more than enough for the average person. 

Bookly

Would you like something to track your reading progress in real time? Here comes Bookly, you can get not only detailed statistics, but also many personalized reading suggestions. It's much more convenient than manually (手动地) writing down. However, what really makes this app shine is its another distinctive function which enables users to add their own comments, quotes, or thoughts while reading. 

Four of the world's greatest national parks

 Komodo

 Location: Indonesia

 Area: 1,733km²

 Home to the world's largest lizard (蜥蜴), the Kcomodo dragon, Komodo National Park is made up of 29 islands in the centre of the Indonesian archipelago (群岛). The park's three main islands of Komodo, Rica and Pada r make ideal destinations for divers, as the surrounding coral reefs support a vast amount of oceanic diversity. With over 1,000 species of fish, 260 species of coral, and countless sea animals, this is an ideal spot to swim with sharks, whales, dolphins and more.

 Namib- Naukluft

Location: Namibia

 Area: 49,768km²

 In the world's oldest desert, the landscape moves. The golden dunes (沙丘) shift as winds blow and seasons pass. Visitors come to explore the dunes and it can be a real adventure. Jump in a 4×4 or hike across the sands on foot for a multi- day trail and you' ll soon find yourself deep in the Namibian wilderness. You' ll need a permit and doctor's letter to take on the longer hikes, but one- day hikes give anyone a chance to see more of the Namib.

 Tongariro

 Location: New Zealand

 Area:795km²

 As New Zealand's oldest national park, Tongariro National Park is home to three active volcanoes. And here's the Tongariro Alpine Crossing, a 19.4- kilometre hike that takes you across beautiful landscapes. This park also draws in skiers during the winter seasons. The biggest ski area, Whakapapa, covers 5.5km² and has 15 lifts in all.

 Teide

 Location: Tenerife, Spain

 Area: 190km²

 This park is home to Mount Teide, the highest peak in Spain. With a height of 3,718 metres, Mount Teide is also the third largest volcanic structure on the planet. Besides, Teide National Park possesses unique plants. The most unusual among the 139 recorded species is red bugloss, which has become the symbol of the park.