Color is everywhere in lives. But what does color mean? Why are people more relaxed in green rooms? Why do people do their best in blue gyms? That's the magic of color!

    Scientists from the US did an experiment. They asked two people to go into two different rooms. One went into a room painted in pink, and the other went into a blue room. They had to stay in the rooms for one hour. But they had to guess the time, because they didn't have a watch or any other thing to see the time. In the end, the person in the pink room came out in about 40 to 50 minutes. The person in the blue room came out after 70 to 80 minutes.

    The results show that color can change people's feelings about time. Warm colors make people feel that time is going faster than cool colors.

    In today's world, almost everyone knows that air pollution and water pollution are harmful to people's health. However, not all the people know that noise is also a kind of pollution, and that is harmful to human health, too.

    People who work and live under noisy conditions usually become deaf. Today, scientists believe that 10% of the workers in Britain are becoming deaf because of the noise where they work. Many of the workers who print newspapers and who weave cloth (织布) become deaf. Plenty of people living near airports also become deaf. Recently it was discovered that many teenagers in America could hear no better than 65-year-old persons, because these young people like to listen to pop music and most of pop music is a kind of noise. Besides, noise which is produced by jet planes or machines will make people's life difficult and unpleasant. It can make people ill or even drive them mad.

    It is said that a continuous noise of more than 85 decibels (分贝) can cause deafness. Now the governments in many countries have made laws to control noise and make it less than 85 decibels.

    In China, the government is trying to solve not only air and water pollution problems but also noise pollution problems.

First Man is a picture book, it tells the story of Yang Liwei and his trip to space.

As we all know, Yang Liwei is China's first astronaut to fly into space. Yang was born on June, 21st, 1965 in the city of Huludao, Liaoning province. When he was 38 years old, he took Shenzhou-5 spaceship to space.

To help people get to know the Chinese space hero better and learn about his trip to space, the picture book was born. It is based on Yang's autobiography（自传）Long March to Space. In 2021, One Day in Space, a passage from Yang's book, was included in the seventh-grade textbook in Chinese middle schools.

Yang Liwei left for space at 9:00 on the morning of October 15th, 2003 and came back to the earth at 6:23 on the afternoon of October 16th. During the 21-hour stay in space, he flew around the earth 14 times. With great pictures and simple words, the book tells an exciting story as well as space science in an interesting way. From the book, we know that it is really ____ for people to travel in space. There is no gravity（重力）in space, so people don't feel comfortable. Yang's story tells us that nothing is impossible for a willing heart.

Wu Xiaoxi from the BSTP（北京科技出版社）came up with the idea of writing such a book. "There is a surprise in the book for readers-a picture of a rabbit looking at the moon," Wu says. "China plans to send people to the moon by 2030．We hope to write nice picture books at that time."

Our dog Max ate a plastic bag by accident. So my family and I rushed to the Emergency Vet(兽医诊所) at midnight. It nearly {#blank#}1{#/blank#}(杀死) Max. However, this is not the only case. In fact, thousands of {#blank#}2{#/blank#}(动物) lose their lives every year because they eat plastic bags. 

Plastic pollution is a {#blank#}3{#/blank#}(严重的) problem. We must take some {#blank#}4{#/blank#}(步骤；措施) to fight against it. The project "Say No To Plastic Bags" is a good try. When you go shopping, take your cloth bag and say no to plastic bags when they are {#blank#}5{#/blank#}(提供) to you. By refusing plastic bags, you are also {#blank#}6{#/blank#}(减少) the amount of plastic bags being produced. This action also means that {#blank#}7{#/blank#}(更少的) plastic bags need to be made. 

If you have to use plastic bags, try to {#blank#}8{#/blank#}(再次使用) them when you can. When they no longer have any use, please {#blank#}9{#/blank#}(回收利用) them. They can be changed into things that will be given back to our community, like outdoor furniture for schools. 

Every little bit makes a {#blank#}10{#/blank#}(差别)! Act now and play your part. 

As a student, you must have met different kinds of teachers. Do you like them? Do you {#blank#}1{#/blank#}(确切地) understand them? Here are my opinions about my three teachers.

Ms. Li is my English teacher. To begin with, I was poor in English and often made mistakes in {#blank#}2{#/blank#}(语法). Now, I have improved a lot because she always asks me to take notes in class and explains difficult points to me clearly. She {#blank#}3{#/blank#}(避免)making us feel silly. I've always hated making mistakes or worrying about my reading {#blank#}4{#/blank#}(速度), but Ms. Li just smiles, so that I don't feel that silly!

Ms. Chen is very serious and strict. In her class, we don't {#blank#}5{#/blank#}(敢于)to say a word if she doesn't ask us to. Some of our classmates don't like her because she seldom {#blank#}6{#/blank#}(赞扬)us. But I don't think so, I really {#blank#}7{#/blank#}(仰慕)her because her teaching is so well-organized and clear. Thanks to Ms. Chen, I got more chances to take part in the math {#blank#}8{#/blank#}(竞赛).

Mr. Wu is very popular. Ho likes playing {#blank#}9{#/blank#}(悦耳的) music in his class. You can't imagine what a great teacher he is! He's really understanding and funny. When he thinks we're getting bored, he will ask us to sit {#blank#}10{#/blank#} (在…旁边) him and tell jokes to make us active again. We really respect him a lot.