What is the sky? How high is it? What color is it? What birds can live above it? These questions are difficult to answer, aren't they? In fact, the sky has no color. Then why does the sky look blue?

    We know that there is air around the world. When planes fly, they need air to lift their wings. Planes can't fly very high. That is because the air gets thinner when they go higher. The same will happen to us if we go high enough. If we go up about 1,200 kilometers from the earth, we'll find no air there. Some birds can fly into the sky as high as a plane, but they cannot fly or live without air.

    Looking up above us, you will see the blue sky with white clouds. It is usually light blue. The color would be bluer when you see on the top of a high mountain. And you will see fewer clouds in the sky between you and the sun. Sometimes the sky doesn't look blue. When the sun rises and falls, you will see red, orange and other colors in the sky, such are the most beautiful moments of the day.

    Who can see the colors of the sky high above the earth? The astronauts! They can see those beautiful colors of the sky from the outer space. However, before flying into the outer space, they sit in a spaceship high above the earth and there is no air at all. The sky would be that dark and its color would be black.

    Now you may understand that we see colors because the air scatters (使散射) the sunlight. Light travels through the air. Without air there would be no colors.

Do you know how many kinds of plants and animals there are in the world？ Maybe one million（百万）？Two million？ No，not even close! Scientists think there are between eight and fourteen million kinds of plants and animals, but we only know about 1. 8million now. They are slowly finding new kinds all the time, and that's good news for us. 

In 2009, a group of scientists went to the rainforest to search for new kinds of animals. They had to walk silently and looked really carefully. They found a tiny frog（青蛙）that is smaller than the end of your smallest finger! They found another frog, too. That looks like it is made of glass. The scientists also found seven new kinds of grasshoppers（蚱蜢）. Some of the are very beautiful. 

Scientists tell us that frogs and insects（昆虫）are very important. They help to keep our environment clean. We can also use them to make new medicines. Researchers all over the world are working very hard to find new plants and animals every day. But their jobs are getting harder, because forests where these animals live are quickly disappearing（消失）and the animals are，too. 

Qingqiang Opera is a traditional Chinese opera in Shan'xi Province. Hou Hongqin is a Qinqiang Opera actor. Hou is famous for her sweet1 because her singing is special and great. She enjoyed practising it，although it was2 . She is especially thankful that she can learn from Xiao Yuling，the famous Qinqiang Opera actor. So Hou often feels she is3 . 

Hou became the head of an opera group in 2005. It was hard because she knew nothing about leading a group，but she decided to4 the challenge （挑战）. "I will use all of my experiences to5 Qinqiang Opera. Being an actor is not enough. Young people should know it and try to learn it. I will do my best to6 the opera to let more young people learn about it，" Hou says. 

Hou has a7 with lots of clothes. "If I am asked to give a show，I can take the bag and leave8 . I want to give more shows to let more people know about it. " Hou says. Most Qinqiang actors begin learning at 11 or 12，and they know nothing except Qinqiang，so it is almost not9 for them to change their job，" says Hou. 

"We must give young actors more care and10 . Now young actors are able to take part in more shows. "

2023年杭州亚运会上运动健儿们在赛场上顽强拼搏的精神让国人感动。运动让人快乐、让人成长。学校即将举行主题为"增强体质、锤炼意志、健康生活"的运动会，请你谈谈你对运动的看法并号召更多的同学管理好时间，切实将运动融入到我们的学习生活当中。

要求：

1.不逐字翻译；

2.文章总词数为60, 开头已给出, 不计入总词数；

3.文中不能出现真实的校名和姓名。

The 19^th Asian Games (Hangzhou Asian Games) has just finished. It has moved me so deeply and brought me many thoughts about sports. 

In China, there are four ancient inventions—writing brushes（笔）, ink sticks（墨）, paper（纸） and ink stones（砚）. 

{#blank#}1{#/blank#}Those made of wool（羊毛） are called yanghao and those made of weasels'（黄鼠狼） tail hair are called langhao. 

{#blank#}2{#/blank#}A story goes like this:Two famous skilled men Xi Chao and his son produced a kind of perfect ink stick. As a result, the Emperor Li Yu in the Southern Tang Dynasty agreed to give them the family name "Li". In the Song Dynasty, its producing area was changed into Huizhou, and it was then called the Hui Ink Stick. 

{#blank#}3{#/blank#} In Xuancheng, it's said that Cai Lun's pupil Kong Dan happened to see the ebony（檀木） in the rivers. It was wet with the water and turned white. Then Kong Dan used the bark（树皮） to produce world-famous Xuan paper. 

{#blank#}4{#/blank#}Duan Ink Stone, She Ink Stone, Tao Ink Stone and Chengni Ink Stone are the most famous. 

Would you like to practise calligraphy with a brush(练毛笔字）？Why or why not?{#blank#}5{#/blank#}