How do you keep cool during summer? Air conditioners or electric fans are good 1 in modern society. But 2 that, people could only use fans.

    Over 3,000 years ago, fans began to 3 They were made of feathers (羽毛), bamboo or silk. They came in different 4 , including round and square.

    Later, with the invention of paper, folding(可折叠) paper fans became popular5 the Song Dynasty.  There are usually beautiful 6on fans. Some are landscapes (风景). Others are flowers and animals. Moreover, many great people including Su Dongpo, a poet of the Song Dynasty, and Tang Yin, a scholar (学者) and painter of the Ming Dynasty, once painted their masterpieces(杰作) on fans. This made fans not only 7 tools in daily life but also great artworks.

    So, with its value of beauty, people take fans as a 8 of status(地位). That's why in old China, emperors and scholars often held fans.

    Today, fans are also great collectors' items(藏品) and gifts. On the opening ceremony of the 2008 Beijing Olympic Games, folding fans were9 to leaders and officials (官员) of other countries. While they were 10 fans to get cool, they were also experiencing Chinese culture.

    Lasers（激光） have many uses including improving someone's eyesight, playing DVDs, cutting the diamonds（钻石） and the list goes on and on. Now, there could be a new use for this powerful tool-changing the weather!

    The Swiss scientist Jean Pierre Wolf is working on using laser beams（激光束） to change the weather for the better. He wants to use it to help stop climate（气候） change. Sounds crazy, right? Well, there is already something kind of like it.

    Cloud seeding（云催化） is a way people stop rain from falling. It uses rockets to release chemicals into the atmosphere（大气层）, but it's not known what this might do to the environment. So Professor Wolf wants to find a better way to do this, and a laser is a good choice since the only thing it uses is light, not chemicals. But how would it work? According to CNN, it would make new clouds. The laser would make condensation（冷凝） happen, in other words producing drops of water. And then the water would turn into really small pieces of ice. Then clouds start to be made just naturally.

    Professor Wolf's hope is to help control the weather in places like California that can face both heavy floods and droughts（干旱）.They are also trying to use lasers to control lightning. Using lasers to change the weather has been tested in a lab, and they have been quite successful in some fields. They are still trying to find out how to use it in the real world, but it could be a new way to stop climate change. "Every time you think you have done everything you can with lasers, something new comes up," said Professor Wolf. "It's quite amazing."

    Now too much CO makes the Earth warmer and warmer, and brings bad effect to people. To save our Earth, a new lifestyle called low-carbon life becomes popular. Low carbon means low energy and no waste. It is necessary for everybody to learn to live a low-carbon life.

    To live a low-carbon life, we'd better save as much energy as we can. For example, turn off the lights and TV when you don't use them, use cold water to wash clothes or dishes: take a short shower and try to take a cold one when the weather gets warm: don't do the cooking with electricity.

    To live a low-carbon life, we should eat less meat. Being a vegetarian can help reduce (v)one and a half ton of carbon dioxide a year, but keeping animals for food produces even more carbon dioxide than all the cars do in the world.

    To live a low-carbon life, we should plant more trees. Trees are very important for us. They can not only produce oxygen for us to breathe and keep the air clean. But also take in the harmful gases from the air. To protect trees we should stop people from cuing down trees and plant as many trees as we can.

    If we can keep them a habit in our daily life, the earth will become a safer planet for us to live on.

    It's Friday today and we have an art class. But we don't have it at school. Where do we have it? Do you know? We have the class in the1It is our first time to have a class outside, so we are very2

    In the morning, our art teacher, Mrs. Wang3the classroom and says, "Boys and girls, today we'll have a class in the zoo. You can see your favorite animals and draw pictures of4there."

    Then we take a bus to the zoo. After we5there, we see so many animals. Some6eat bamboo (竹子). They are so cute. Tom7a picture of them. Jenny's favorite animals are monkeys (猴子). She wants to see them first.8those monkeys are in the trees. They don't come9, so Jenny can't see them. She doesn't know what to do. Peter is very10.He asks Jenny to give (给) these monkeys some bananas. Then all the monkeys come to them. All of us are happy to have the class in the zoo.

    Smiling is the best way of making friends.

    When I was thirteen 1 old, my father found a job in the city. So my family moved there. I also came to a/an2school near where we live. My old school was far away. At first, I did not know anyone in my class. I was very lonely 3I was afraid to make friends with my classmates. I 4talk to anyone about my problem, and I didn't want my parents to 5me.

    Then one day, something good happened. I was sitting at my desk 6as usual while my classmates were talking happily with each other. At that moment,7 came into the classroom. I only knew he was my classmate but didn't know what his name was. He passed me and then turned back. He looked 8me and, without a word, smiled. Suddenly, I felt happy, lively and warm. That smile changed my school life. I started to talk with the other classmates and make friends. Day by day, I became 9to everyone in my class.

    10the smile, I have moved on to a new life. Now, I believe that the world is what you think it is. So smile at the world and it will smile back.

When I was about ten, I was woken up by the shouts（喊声）of my sister one morning. She was hungry, but my mother wasn't at home, so I made a banana cake for her. Let me share the recipe with you.

What you need:

2 eggs  3 bananas  2 cups of flour(面粉)

2 spoons of baking powder(发酵粉)

1/4 spoon of baking soda (小苏打)

1/2 spoon of salt

2/3 cup of sugar

1/3 cup of vegetable oil(油)

What to do:

l  Mix(混合) together the flour, baking powder, baking soda and salt in a large bowl.

l  Add the vegetable oil. Then add a little sugar, and stir (搅拌) it.

l  Pour the eggs into the bowl and stir them well.

l  Add the bananas and stir them.

l  Turn the oven to 180℃.

l  Pour them into the oven（烤箱）. Bake（烘焙） the cake for 20 minutes.

l  Get the cake out of the oven, and cut it into pieces to eat.