Is there intelligent(有智力的)life on other planets? For years, scientists said "no." or "we don't know." But today this is changing. Seth Shostak and Alexandra Barnett are astronomers(天文学家). They believe intelligent life exists(存在)somewhere in the universe. They also think we will soon contact these beings(人;生物).

    Why do Shostak and Barnett think intelligent life exists on other planets? The first reason is time. Scientists believe the universe is about 12 billion years old. "This is long enough for other planets to have intelligent life," say Shostak and Barnett. The second reason is size—the universe is huge. "Tools like the Hubble Telescope(哈勃望远镜)have shown that there are at least 100 billion galaxies, " says Shostak. "And our galaxy, the Milky Way, has at least 100 billion stars. Some planets going around these stars might be similar to Earth."

    In the past, it was hard to look for signs of intelligent life in the universe. But now, powerful telescopes(高倍望远镜)allow scientists to discover smaller planets——the size of Mars or Earth—in other solar systems. These planets might have intelligent life.

    Have beings from space already visited Earth? "Probably not," says Shostak. "It's a long way away. However, intelligent beings may contact us in other way, such as radio signals(信号). In fact, they may be trying to communicate with us now, but we don't have the right tools to receive their messages. However, this is changing. By 2025, we could make contact with other life forms in our universe and we might help each other."

    It is a cold and dry winter morning. When you wake up, you feel that your throat hurts. You begin to sneeze and later you may cough. You must have a cold！Wait a moment. Could it just be a common cold or the flu(流感)that's been going around？

    A cold gives you a runny nose and cough. But it's usually easy to deal with. Some people take medicine while others drink herbal tea or chicken soup. Usually you feel better after a week.

    On the other hand, the flu can be much more dangerous. It usually gives you fever. Sometimes it can cause death. According to an American magazine, the worst flu killed about 50 million people from 1918 to 1919.

    Don't worry. If you get a flu vaccine(疫苗), it can stop you from getting the virus(病毒).Flu vaccines work by giving the body a small number of flu viruses. This causes your body to develop antibodies(抗体). So next time you get the flu, the antibodies will help you.

    The flu virus changes every few years. Therefore, there are so many types of flu, such as HlN1 and H5N1.The antibodies for one type of flu can't help us against all types of flu. That's why we need to get the vaccine every year.

    However, good healthy habits may also help stop you developing a cold or flu. Washing your hands often helps stop you from getting viruses. It is also important to get regular exercise and eat healthy food. All these can help you strengthen(增强)your immune system(免疫系统).

After a long day's study at school, you are very tired. So after school you go home to relax. When you get home, a robot welcomes you. He's happy to see you and helps you take your school things to your room. He listens to you talk about your school life and tells you a new joke. And he tells you to call your cousin and to say happy birthday. And then he helps you with your homework. 

This is your future, and the robot's name is NAO. NAO has a small body, big eyes and a large head. He can walk and dance. He listens and talks, and he even learns and thinks for himself. His creators predict that the robot will be in people's homes before 2040. This $16, 000 robot knows who you are. 

NAO can even express emotions(表达情感). He is a self-guided robot. A self-guided robot can sense(感觉), think and act. Other robots might do two out of the three. For example, a robot might sense things using cameras and think using computers, but with no arms, he can't act. Another robot can move and sense things, but he can't think for himself. These aren't self-guided robots. But NAO can do them all. 

 Cooking is supposed to be the most basic living skill for humans. However, there are many kids who are used to being fed and taken care of everywhere like" little emperors and little princesses". They can't tell the differences between food materials like leeks (韭菜) and shallots (大葱).

 In order to stress (加强) the importance of hard- working spirit education among students, the Communist Party of China Central Committee recently released (发布) the guidelines (方针). The guidelines call for students to respool labor work. Students should learn basic life skills and develop good working habits through such education.

 Students will be required to understand and master the basics of home cooking from preparing vegetables to finally being able to complete the whole process of home cooking independently. These will be lifelong skills for kids, helping them develop into well-rounded persons instead of those who are just able to take exams.

 As children's first teachers, parents should also encourage children to learn how to do chores at home. Students should master one or two life skills every year. These skills can include cooking, washing their own clothes and tidying their rooms.

 It's really important for students to take labor education both at school and at home.

I wake up at six in the morning. Dad is putting the cows and sheep onto the trucks. Mom is putting my favorite milk food and some dried meat (肉干) in a bag. We will start driving to another past ure (牧场). We won't forget to take our yurt(毡房) with us!

 My family moves like this four times every year. It's a tradition (传统) of the Kazak people in Altay, Xinjiang. We have about 100 sheep and 40 cows. We move to different places as the seasons change. So, our animals can always have fresh grass to eat.

 Kazak people have been traveling this way for thousands of years. In the past, it took people about ten days to get from one place to another. If it rained or snowed, traveling was even harder. Luckily, now we have trucks. It only takes us five hours on the road! And as we move from place to place, our lives keep getting better and better.

The reality show(真人秀) is a kind of television program. A reality show {#blank#}1{#/blank#} ( usual) has many series. And it can be shown on TV for many years.

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The first reality show a {#blank#}5{#/blank#} in the 1990s in America. At that time, the most f {#blank#}6{#/blank#} and popular reality show was Survivor. It was popular around the world.

Reality shows also show different kinds of c {#blank#}7{#/blank#}. For example, there is a very {#blank#}8{#/blank#}( success) Chinese reality show called The Voice of China. In this show, there are four Chinese sing- ers. Their job is to find their favorite students and help them be the {#blank#}9{#/blank#} ( win). Lots of people like to watch it.

H {#blank#}10{#/blank#}, some people don't like to watch reality shows. They think the stories in the shows are made up.