In America, the school life is not easy for us students. There are so many rules we have to follow. When we start school, we get a rule book. There are always teachers looking out for people who are breaking the rules and prefects (长官) are everywhere too.

    The most rules are in the classroom and in the hallways. For example, you can't run or dance around in the hallways. We can't put our bags everywhere in the hallways.

    You can't eat or drink in the classroom or the hallways. Prefects watch you, They can give out duty slips (cleaning the dining hall for about 2 hours).

    If you make mistakes, you will get a detention. You may have to do some work for school. A detention is the most painful. You have to do a lot of tiring and boring things. There are rules for students out of school as well. Boys should not buy take away food in the street if they wear the school uniforms. The school also expects good behavior on public transport and in public places.

    Is it good to be in a middle school? Most American children think so. In America, middle schools often have sixth, seventh, and eighth grades. It is different in different places.

    For children, going to a middle school is a big change. Most middle schools in America have a special day for new middle school students. On that day, they are showed around the school by their new teachers. And they could know a lot about the history of the school. They also would make friends with the old schoolmates (校友).

    They will grow up and learn some different and difficult things in a middle school. A new middle school student will learn foreign languages, computer, music and art, health, and other skills, such as cooking.

    A middle school will have sports teams, clubs and have activities for children. They can choose what they like and join them. If they are good at singing, playing basketball or something else, or if they want to learn, they can join them. Most American children think it's good to be in a middle school.

    Imagine you are taking a walk on the beautiful beach. Just then, your feet step over something and you hear a crack (噼啪声) —an empty plastic bottle. Things like this are happening more often because of sea rubbish.

    Studies show that 80%of all the waste is from the land. The waste is mainly plastics (塑料制品) which are really hard to degrade (降解). So the rubbish will remain there for a long time. Some of the pollution is caused accidentally. For example, about 10,000 product-filled boxes are lost at sea every year from business ships. Sometimes people just throw things into the water from boats or land. Many large rubbish areas are formed in the North Pacific Ocean.

    Thankfully, the situation isn't ignored (忽视). Groups like the National Oceanic and Atmospheric Association (NOAA) are taking action to help clean the sea. Since 2006, 76 projects have cleared out 3,814 metric tons (公吨) of rubbish from the sea. Methods of rubbish cleaning include using machines to remove (移除) the waste away from the surface of sea water. Besides, special nets are set by the mouths of rivers to stop the rubbish before it reaches the sea. If everyone does his part, sea rubbish seems like a problem that can be solved.

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A famous designer（设计师）and a university student produce a new cup called Vessyl. They have spent several years1it. The smart cup can not only tell Coca Cola from Pepsi Cola,2also tell people whether they should drink water or not.

When people3liquid（液体）into this smart cup, a few seconds（秒）later, it can check this kind of liquid and tell them what it is. Then it gives4information about the drink, such as sugar, fat and calories. When people put the cup in their5, it can also show them condition of their bodies. If they are6, Vessyl will tell them to drink water.

"My partner and I want people to7healthy. In modern society, people are usually8busy to do exercise, or even drink enough water every day. They have much9. We produce this smart cup so that people can make a choice10," the designer said.