How much do you know about "Taobao"? Do you often buy goods(商品)online? During every big festival hundreds of millions of dollars is spent online. "Who needs a shopping mall if you have Taobao? I am a Taobaoer，" says Wang Fang, 28, a writer in Beijing. Taobao, China's largest online shopping site(场所)，has become an important part of Wang Fang's life. Half of her salary(薪水)is usually spent on Taobao.

    A growing number of Chinese Internet users like Wang have found the pleasure of online shopping. Most online shoppers are students and young workers. People can find almost everything they need online, from clothes to books, from candy to DVD players. And clothing and household(家用的)products are the most popular goods bought online.

    The biggest attraction for buyers is the low prices of online goods. Buyers can also check the information easily. They can compare the prices of the same kind of goods from different sellers, and choose the cheapest one. When someone asks her about the safety of online shopping, Wang Fang said ,"It's very safe and easy. If you can't receive the goods from the sellers or are not satisfied with them, the shop owners will not get the money. You can also get your money back if you give the goods back. "

    You may know that more people drink coffee than tea around the world．And that, after oil, it is the second biggest traded commodity (商品)．You may also know that the drink comes from beans which are first roasted and then ground (研磨)．But what else do you know about this popular drink?

    It is said that the story of coffee started with an Ethiopian goatherd (牧羊人) named Kaldi．One day Kaldi was surprised to see that his goats were behaving very strangely．Instead of grazing (吃草) quietly, they were jumping around, almost dancing．He also noticed some red "cherries" from a plant that the goats were eating．He tried some himself and was surprised by the feeling of extreme happiness and excitement．He felt like dancing too !

    But it wasn't used as a drink at first．It was used as food．The coffee berries, mixed with animal fat, were used by monks to stay awake during long hours of prayer．From Ethiopia, coffee was later cultivated (培育) in Yemen and the first hot drink was developed there around AD 1000．Three centuries later Muslims were keen coffee drinkers and as Islam spread, so did coffee．Coffee houses appeared in Cairo and Mecca．

    For hundreds of years the plants were protected safely．But some beans were smuggled (偷运) out of Arabia and taken to India．In the 17th century, coffee was soon grown in a new continent．From India to Indonesia, a century later the beans were once again smuggled to Brazil．Brazil is now the largest coffee producer in the world．

    It was the caffeine that made the goats dance and kept the monks awake．Although it is found in other soft drinks and tea, coffee has the most caffeine．In the short term．a couple of cups of coffee can prevent fatigue and delay sleep．But several cups a day, every day, can cause anxiety and restlessness．

    Learning a language can be useful in today's global society. Do you find it difficult to learn a foreign language successfully? Here are some tips to help you out:

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    By far the most important is how much time you are immersed in the language. The more time you spend with the language, the faster you will learn. This means listening, reading, writing, speaking and studying the language. This does not mean sitting in class looking out of the window, nor listening to other students who do not speak well.

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    Build up your vocabulary! You'll need lots. Start to notice words and how they come together as phrases. Learn these words and phrases through your listening and reading. Read online, using online dictionaries, and make your own vocabulary lists for review. Soon you will be able to use them.

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    Listen wherever you are on your MP3 player. Read what you are listening to. Listen to and read things that you like, things that you can mostly understand, or even partly understand. If you keep listening and reading, you will get used to the language. One hour of listening or reading is more effective than many hours of class time.

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    If you do want to learn the language, try to be an active learner. Choose something that you want to listen to and read. Find out the words and phrases that you need to understand in your listening and reading. Do not wait for someone else to show you the language. Discover the language by yourself, like a child growing up. Talk when you feel like it. Write when you feel like it.

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    Do not worry about what you cannot remember, or cannot yet understand, or cannot yet say. It does not matter. You are learning and improving. The language will gradually become clearer in your brain, but this will happen on a schedule that you cannot control. So sit back and enjoy. Just make sure you spend enough time with the language.

    Drones（无人机）are like planes, but come in many shapes and sizes. They have no pilots and controlled from outside the drones. During these years, they have been used to attack（进攻）enemies or moved goods in dangerous areas.

    Now small drones are a part of people's lives. For example, people use drones to take photos or make videos. Besides, a drone delivery (投递) service has proved successful.

    Online store JD can use drones to deliver small packages（包裹）. It has built several drone stations so that it can load(装载) and deliver its packages.

    Drones have made our shopping experience different. We can order a new coat in early morning and it will be delivered before we finish breakfast.

    Bizzby Sky, a UK company, has created a delivery service for small goods. Open a smartphone app(应用软件), enter your address, set a time and pay enough money for the delivery service. Then in minutes, a drone will do tasks for you.

    However, any drone company needs government permission (允许) to fly its drones in many countries. We believe we will see more and more drones with goods fly in the sky very soon.

    The Grand Canyon(科罗拉多大峡谷) is a large river canyon in Arizona. It is over220 miles long and over a mile deep in some places. Its widest point is 18 miles wide. The canyon is considered one of the Seven Natural Wonders of the World.

    Over millions of years, the Colorado River wore away rocks as it passed through the area. Slowly, the river made the path deeper and deeper. Now, the canyon is surrounded by steep walls on either side, while the river continues to flow at the bottom of the canyon.

    Besides its large size, the Grand Canyon is also known for its magnificent colors. The canyon is made of layers of rock(岩层), and each layer of rock has a different depth and color. Geologists have identified almost 40 different layers of rock exposed by the rivers erosion.

    The climate in canyon area is primarily desert, with both high and low temperatures. The upper rims of the canyon often receive snowfall. The air quality is usually very high, although dust storms and smoke from fires can change the air.

    The Grand Canyon is home to a variety of plants and animals. Plants range from various species of cactuto pine forests. Many types of animals live in the area, including the bald eagle, bobcats, bats and gila monsters. Six different kinds of rattlesnakes have been found in the area.

    Today, the canyon is part of the Grand Canyon National Park. About five million tourists visit the park each year.

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