Many people today like reading stories about UFO.Many people in different countries are studying the UFO.

    There are some different saying for UFO.Among those sayings,the most popular one for UFO is that UFOs are strange creatures(生物) to the earth from other stars.We can call them aliens.

    UFO scientists and many people believed this saying.Some people said that they saw a few UFOs landing on the earth.They seemed to be objects rather like big plates.Some people said that they saw some strange visitors coming out of the UFOs.

    Some people make mistakes when they say they have seen UFOs high in the sky.Perhaps they see a weather balloon or an uncommon plane or the light they see in the sky comes from the ground.Sometimes they see the light from the moon.

    But these are a lot of others we can't understand.It may take many years to find a clear answer and then people will give UFO another name.

    Have you ever heard robot fish? Scientists will put some robot fish into the sea near Spain. These robot fish will help people to detect (探测) the pollution in the water. If the robot fish are able to finish their work successfully, the scientists hope to put them into rivers, lakes and seas around the world.

    The fish are about 1.5 meters long. There will be a detector in their bodies. They can find the sources (来源) of pollution in the water, and then the robot fish will eat part of it. Unlike other robots, they don't need to be controlled by people far away. The robot fish all have an eight-hour battery (电池). They can "swim" in the sea freely and send back information to people on the beach. After their batteries die, they will return by themselves.

    There are five robot fish altogether now. Each costs about 29,000 dollars. They are part of a three-year project between engineering company BMT Group and Essex University in southeastern England.

    "We invented the robot fish creatively. We hope them can find the changes in the sea water and report back the information," said Professor Hu of Essex University. His team is developing the fish.

    Fresh green grass, Hundreds of colorful wild flowers. Water running into little pools. Birds making their homes in boxes. The 9, 500-square-metre Augustenborg Botanical Garden may look just like any other well-organized park but there's a difference. It lies on the roofs (屋顶) of industrial and office buildings in the city of Malmo in Sweden.

    Green roofs are not a new invention. And now they are getting popular again. The common roofs of a modern city have endless black surfaces with no life or water. Perhaps that's why a garden on a roof becomes such a perfect choice for more and more people.

    Green roofs are not just pretty. They also help to moderate the city temperature. The high temperatures on common roofs in the summer can make top floor flats uncomfortably hot. What is more, they play a part in making the cities hotter than the countryside around them, causing the "urban heat-island effect". On a green roof, however, with its plants and water, temperatures change only a little, as they do in a park. This can greatly cut the costs of heating and cooling in the building below.

    Also, a green roof takes in rain water, and protects the city drainage (排水) system.   ▲    And small animals and birds can make their homes on it. Thanks to this, the city may become part of nature, rather than something completely separate from it.

    While the cost of building such a roof can still be higher, it can be cheaper in the long term as a result of energy savings. And wouldn't it be wonderful to be able to walk out into a garden high above the city's noise and traffic, whether you're at school or in an office or just at home in a ten-floor block?

how on ago ask spend ancient and book true what it but

It's time for the new TV show Dian Ji Li De Zhong Guo.Are you ready? 

On the screen, Sa Beining, as a reader, goes into a "library" full of famous {#blank#}1{#/blank#} Chinese classic books. He takes a book, sits down {#blank#}2{#/blank#} opens it. Today he will read Ben Cao Gang Mu.

Don't take your eyes off the screen. Look! The people in the {#blank#}3{#/blank#} "come to life". A play about Li Shizhen who wrote the book begins {#blank#}4{#/blank#} another stage. In the play, Wang Jinsong, a famous actor, plays the role of Li Shizhen, who lived more than 400 years {#blank#}5{#/blank#}. You can see these scenes in the play: Li {#blank#}6{#/blank#} his father to allow him to study medicine. He went with his father to help sick people. And he {#blank#}7{#/blank#} nearly 30 years writing the book. It's a pity that he didn't see his book printed out. 

Then a big surprise appears in the "library". Sa Beining meets Li Shizhen. Sa puts the printed Ben Cao Gang Mu before Li. With tears in his eyes, Li says, "My dream finally came {#blank#}8{#/blank#} Sa and Li bow to each other. {#blank#}9{#/blank#} a moving moment!" 

Besides Ben Cao Gang Mu, Sa also reads Shang Shu, Shi Ji, Tian Gong Kai Wu,etc. In this new form, Dian Ji Li De Zhong Guo is amazing each time. Why not watch {#blank#}10{#/blank#}and have a talk with the great people through these ancient Chinese classic books? 

The Dragon Boat Festival

The Dragon Boat Festival is celebrated on May 5 of the lunar calendar (农历). Eating zongzi and racing dragon boat are the most important traditions to memorize Qu Yuan. He jumped into Miluo River and died. Local people decided to throw food into the river to feed the fish so that they wouldn't eat Qu's body.

Tomb-Sweeping Day

Every year in early April, people in China visit that tombs (墓) of their ancestors(祖先). It is Tomb-Sweeping Day. On that day, Chinese families will sweep the tombs and clean away the grass around them. Then they burn paper money and put flowers and fruits in front of the tombs.

The Laba Festival

There is a festival called the Laba Festival before the Spring Festival. It has been a long tradition that people eat Laba porridge to celebrate the event that day. Laba porridge is the most important dish for the Laba Festival. In general, It is made by rice, nuts, grains (谷物) and dried fruits.

Dragon head-raising day（龙抬头）

People believe that getting a haircut during the first lunar month is not a good idea. After a month's wait, people usually cut their hair on Dragon Head-Raising Day—the second day of the second lunar month. It was once a tradition to line up outside the barber shops(理发店) on this day.

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.