Skyscrapers are very tall buildings in a city.  Looking up at them might make you dizzy (眩晕的). {#blank#}1{#/blank#} Skyscrapers are a .wonder, whether (不管) you are looking up or down.

    How can the buildings be so tall? Something that happened during the 1880s made it possible. {#blank#}2{#/blank#} First, a man named William Jenney got the idea of using a steel frame to hold up the walls and floors (钢架支撑墙壁和地面) of a building Jenney s idea made it possible to build taller buildings so he is called the "Father of the American skyscraper" Second, the elevators （电梯）improved. {#blank#}3{#/blank#}That helped people go up and down the tall buildings more easily."

    Back in the 1880s, Jenney s first tall building was 10 stories (楼层) high. {#blank#}4{#/blank#}In 2004, Taipei 101, at 101 stories high, became the tallest building in the world. But soon the Burj Khalifa in Dubai overtook it in 2010. The 828-meter building has 163 stories.

    {#blank#}5{#/blank#} For example, Shanghai Tower in China, One World Trade Center in the USA, Abraj Ai-Bait Clock Tower in Saudi Arabia, etc. All of them are really wonderful, aren't they?

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Teenage life—better now, or in the past?

    Does this situation sound familiar（熟悉）?

    You are complaining（抱怨）to your parents about something. Maybe your computer isn't powerful enough to play the latest games.{#blank#}1{#/blank#}.Then you hear…

    “When I was your age, there weren't any computers or video games. And I didn't get a bike until I was sixteen. And it was second-hand.{#blank#}2{#/blank#}”

    So, is it really true that life is better for teenagers now? It is certainly true that many teenagers have got more things nowadays.{#blank#}3{#/blank#}So parents have got more money to spend on each child. And many things are cheaper than they were when our parents were children.

    {#blank#}4{#/blank#} Forty years ago, no one could imagine a world with tiny computers and amazing smartphones. And now these things are necessary—we can't imagine living without them!

    However, technology often means we spend more time at home. And often it's just us, with our computer or television. Teenagers don't do enough exercise.{#blank#}5{#/blank#} And, although young people still get on well with their friends, some people think teenagers today don't have so many social activities as they did in the past.

    What do you think? How is teenage life better these days?

A. And it was too big for me.

B. A typical family is smaller now.

C. Or your friends' bikes are better than yours.

D. So they aren't as healthy as they were in the past.

E. Technology is probably the greatest change in our life.

    Mr. Guo is a teacher from Xi'an.  He asked his students to hand in their homework through a QR code(二维码). "We spent an hour or two in class learning how to generate(使产生) the codes, and in the end everything gets easier. "Said Mr. Guo, "When students finish the homework, they keep it on WeChat. Then, each student makes his own QR code and gives it to me. So I can cheek their work anywhere using my computer or telephone. "

    The QR codes can be sent to Mr. Guo by email, QQ and WeChat. When Mr. Guo scans (扫描) his students' QR codes, their homework appears on his phone, lie finds that their homework becomes more creative, with many pictures, music and even videos.

    Mr. Guo's students like the new way and think it is interesting. "We are living in the information age. Many students like to work with computers, which makes learning more fun. "Said Tingling, a student of Mr. Guo's.

    "The paper is not easy to keep, hut the code is easy to keep and share." Mr. Guo said," It is worth trying to use new technology in education. Education itself is a kind of creation. I don't want my students to fall behind the times. "

    However, some parents are worried. They are afraid that their children will spend too much time on computers and less time communicating with teachers. But in fact, it's unnecessary. Students still need to look up information in books and write it down when they do their homework. They only use the codes when they hand in their work, which doesn't take them too much time.  Also for teachers, it allows them to cheek the students' work at any time.  And it's also an easy way to share homework with other students.

    It is said that the eyes are "the windows of our soul". Beautiful and bright eyes not only show a good health but also make you look very attractive. However, to have healthy eyes, you have to look after them properly. Your eyes need taking good care of.

    Be careful with your diet. First, eat food that is good for your eyes. They are fresh fruits, vegetables, fish, eggs, and milk. Besides, a regular amount of vitamins A and B2 should also be taken.

    A regular and sound sleep is a must. It relaxes your eyes and gives them enough rest. Sleep not only helps repair the tired body. Usually, you must sleep for at least seven to eight hours every day. Loss of sleep can give you dark circles under the eye.

    You must exercise your eyes every day. Blink(眨眼) your eyes at regular periods, which makes the eyeballs full of water and gives them a good wash.

    We use our eyes in many wrong ways. Fox example, if a small thing goes into our eye we start rubbing it, which is wrong. Rubbing can hurt your eyes. Don't read or write in poor or bright sunlight. Always use sunglasses as sunlight can cause eye tiredness. Light should not shine directly in your eyes.

    Too much reading, watching TV or working on the computer can also cause eye tiredness.

    Remember to always take care of God's most beautiful gift to you. Your life will be very colorless without your eyes.

    A study shows that one million lives might be saved each year if people wash their hands with soap often. It also says that hand-washing with soap could be one of the best ways to reduce diseases (减少疾病). Doctors say many diseases can be stopped from spreading by hand-washing, including the common cold, influenza (流感), hepatitis (肝炎), infectious diarrhea (腹泻) and so on.

    Doctors say that you are easy to catch a cold by touching your nose or eyes after someone nearby has sneezed (打喷嚏) or coughed. Another reason to catch a disease is to eat food prepared by someone whose hands are not clean.

    They also say that hand-washing is especially important before and after preparing food, before eating and after using the toilet, after touching the money and sneezing or coughing.

    The most helpful way is to wash them together while you are using soap and warm water. You don't have to use special soap. Be sure to wash all areas of the hands for about 10 to 15 seconds.

Basic Knowledge of Hand-washing