Can you imagine a world without a writing system for your language? It may be hard to picture it now, but a man named Sequoyah lived in such a world. Sequoyah was a member of a native American tribe(部落), the Cherokee. Cherokee people speak their own language, but for hundreds of years they did not have a system of writing. Without a writing system, the Cherokee had no newspapers or books before 1809.

    Sequoyah was probably born around the year 1770 and lived with his mother in a small village in the mountains of Tennessee. When he grew up, he became a blacksmith(铁匠). When he was doing business with those “English-speaking people”, he noticed that they used paper with marks to record their thoughts and ideas. Sequoyah called these pieces of paper with marks “talking leaves”. He began to wonder why people who spoke Cherokee did not have a way to write down their words.

    In 1809, Sequoyah decided to give the Cherokee their own “talking leaves”. At first he tried to make a different symbol for every word in the Cherokee language. But in that case, there would be so many symbols and too hard for people to remember, so he decided to make a picture for each syllable (音节). After much hard work, Sequoyah invented 85 symbols. In order to see whether it would work, he helped his six-year-old daughter Ayoka learn each symbol and found she could learn to read and write very quickly. Sequoyah's invention was a success!

    Before long, Sequoyah's writing system had spread far and wide. Cherokee people living in all different parts of the country learned to read and write. In 1825, Sequoyah's system was made the official written language for Cherokee people. To this day, Cherokee speakers still use Sequoyah's writing system. In some parts of the United States, you can see street signs and billboards written in both English and Cherokee. Sequoyah will always be remembered for his important contribution（贡献）to Cherokee people.

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    Started in the year 1970, Earth Day is now celebrated in more than 193countries each year. Every year, the event is celebrated under a different theme. The theme for 2016 is" "Trees for the Earth". Here are five things you can do to celebrate Earth Day (apart from planting trees)and make this a better world for future generations.

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    Cars, being the greatest source of air pollution, can be left at home this weekend. Traveling by public transport is the better choice. Other greener choices are carpooling, riding a bike or you can also walk if your workplace isn't that far away from your home.

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    NO, we don't mean you should be dirty. We simply mean to say, don't take a bath every day. A day or two without a bath won't harm you, but it will certainly do a lot of good for our planet. Water saved is the planet saved.

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    This is one of the best things you can do. Why? Because it will do you good, too. Volunteer to join other tasks. If you have time, you can plant trees, clean a park or simply come up with ways you can preserve mother Earth.

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    This is one of the most common things that people can do at home, that is, turn off their lights. However, this isn't something you should do just for a day. Save energy by turning off all electricity points whenever they are not in use.

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    Do something every day that will improve your surroundings and contribute to making the planet a better place to live in. Always remember that every step counts.

    What would you do if you felt anxious(焦虑的)？Would you feel better if someone else could share his or her experiences with you? In the United States, two teenage girls set up a mental health camp called "Healing(治愈)Hearts" to help people deal with anxiety.

    The idea of creating the camp came from Dinah Martinez, 17, and her schoolmate Janet Martinez, 18. Both girls suffered from anxiety.

    Dinah Martinez always did well in school. "But then I just started to collapse(崩溃),"Dinah Martinez said. She stopped talking to her friends, stopped going to school for three weeks and stayed at home.

    Janet Martinez was anxious in elementary school. Things got even worse in junior high. "It was a lot of pressure(压力)I put on myself. I would wake up in the morning and it was like my heart was racing," she said.

    The girls' camp idea got support from Girls Leading Our World (GLOW) in the US. The organization awarded them $ 5,000 to put on the camp for other teenage girls.

    The "Healing Hearts" camp was created to "help deal with anxiety, especially with girls in high school because that's when they are the most vulnerable(脆弱的), "Janet Martinez said.

    On the first day of the camp, 10 girls were there. Experts at the camp talked about anxiety. They helped girls who were experiencing anxiety. The girls learned how to calm themselves when they are anxious. They learned about calming methods like deep breathing and guided mediation(调节).

    "It's good to know that someone else is going through the same thing as me and we can both help each other out," Dinah Martinez said.

    Mr. Smith is a teacher. Yesterday he did a survey of what his students did on their last day off and this is what he learned.

    Linda went to see her grandparents. Her grandparents live in the countryside. They are very old. But they don't like to live in the city. They want to have a quiet life. Tom helped his parents do some housework. He cleaned the room, took out the trash, washed all the clothes. At noon, he helped his mother cook lunch. Mary look after her little brother because her mother was ill. Her father had to look after her mother in the hospital. Mike studied history at home. He isn't good at history. He thinks it is too difficult for him. His father helped him. Both his father and his mother hope that Mike can be good at all his subjects. They want him to study in a famous university one day.