What will happen in 100 years? What will the changes be? Can you imagine? The population is growing faster. There will be more people in the world and they will live longer than people now. Maybe some of the rich can live on the moon. Hand-held computers will be much smaller and more useful and there will be at least one in every home. The Internet speed will be much faster. People will work fewer hours than they do now and they will have more free time for sports, watching TV and traveling. Traveling will be much easier and cheaper. There will also be changes in our food. No one will eat meat every day, they will eat more fruit and vegetables instead. Work in the future will be different, too. Dangerous and hard work can be done by robots. Because of this, many people will not have enough work to do. This will be a problem.

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    Recently, Chongqing Three Gorges University has held an activity named “Cell Phone Ninja”(手 机忍者). They would like their students not to use cell phones for 21 days. It is really a challenge( 挑 战)for most students.

    The activity started on April 12. Each student who volunteered to take part in this activity got a bracelet(手环). If the students did not use their cell phones, there would be a photo on the screen of the bracelet to show that. If they used their cell phones, a different photo would appear on the screen of the bracelet. After the last class of each day, the students sent the photos to the school's public Wechat.

    More than 800 students wished to take part in this test, and 400 were chosen. After seven days, only 103 students remained. The test was set for 21 days because some scientists believe that 21 days is long enough to help people form a habit.

    According to the teachers in the university, the activity was not a competition. It depended on students themselves to make the decision. The teachers hoped their students could form better study habits through activities like this one.

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① There are 56 ethnic (民族的) groups in China. Different ethnic groups have their own special cultures. Let's enjoy some of them.

② The Bai people use a very old way, tie-dye(扎染), to dye clothes. Tie-dye has a history of nearly 1,500 years. During the Tang and Song dynasties, people chose tie-dyed clothes as gifts.

③The Mongolian people live in the Mongolian yurts(蒙古包). These yurts are large round tents and their tops look like umbrellas. They are the traditional homes of the Mongolian people. The yurts are usually white because they're made of sheep's wool. And white is a symbol of happiness.

④ The Zhuang people like singing even more than talking. On the third day of the third Chinese lunar month, they hold a big singing festival. It is thrilling and wonderful. Men and women singers sing in pairs. The winners are the "king" and "queen" of singing.

⑤The Miao people have a special festival, the Manghao Festival. It's in the first Chinese lunar month every year. The Miao people regard Manghao as a hero who helped to protect their homes. At the festival, young men dress up like Manghao and touch others to send good wishes.

The Chongyang Festival is also called the Double Ninth Festival. {#blank#}1{#/blank#} During the festival，Chongyang cake and chrysanthemum(菊花) wine are the traditional food. Climbing mountains and admiring beautiful chrysanthemums are interesting events. {#blank#}2{#/blank#} It has two layers(层) with nuts and jujubes(枣) between them. Since cake in Chinese is pronounced gao meaning "high" ，people consider climbing a high mountain to be the same as eating the cake. They also hope that they can make progress in the following days after eating the cake. {#blank#}3{#/blank#}

Drinking chrysanthemum wine is a necessary part of the festival. Chrysanthemums have the function(功能) of an antitoxin(抗毒素) and can drive the evil(邪恶) away. {#blank#}4{#/blank#}

It is said that by climbing a high mountain，diseases can be prevented. Many well­known poems were created to describe the scene and feeling of mountain climbing. Now，families，relatives or good friends gather to climb mountains to enjoy the beautiful scenery and share happiness of the holiday with each other. {#blank#}5{#/blank#}