Hello, everyone!  1 to Class 3. I'm your new English teacher, Mr. Yang. Now let me tell you our class  2. First, you can't be late 3 class. You must 4 on time. Second, you must bring your English books and notebooks to every 5. Third, you must   6 English during the pair work activities. If it's 7 for you, you can ask me for help. Fourth, if you have any  8, you must put up your hands(举手). You can't talk or stand up without permission（未经许可）. These are all the rules. They are good for you,  9 you must follow them. I hope we can have a good 10 every day.

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    The koala is unique (独特的) to Australia and is an important symbol of the country. The koala is found in open eucalypt (桉树) forests in south-east Queensland. Even if it is called koala bear, this animal has nothing to do with the actual bear. Koalas have thick fur and large cars.

    Their broad, flat nose makes them look cute, similar to teddy bears. In fact koalas aren't cute. They have sharp teeth and very sharp claws (爪)! Koalas are marsupials (有袋类). This means the mother carries her baby in a pocket while it develops, similar to a kangaroo. The baby koala lives in its mother's pocket for the first six months of its life.

    The name “koala” comes from a native Australian word that means “no drink”. The koalas get almost all their water from the eucalyptus leaves they eat. That's where they get their food too.

    Koalas eat only eucalyptus leaves. The eucalyptus trees are where the koalas live, it's also where they sleep. Koalas sleep about nineteen hours a day!

    Why do they sleep so much? Some people think it's because they're lazy. But koalas aren't lazy. They sleep so much because there isn't much nutrition (营养) in eucalyptus leaves. Koalas store hardly any fat, so they must save their energy. One way to do this is to move slowly and sleep a lot. After a day of sleeping they like to move around and eat just after sunset. They live alone most of the time. Koalas are very protective of their trees. If a koala sees another koala eating in its favorite tree, it might tell the other koala to leave by “barking” at it. Koalas do “talk” to each other.

    Besides barks, the males make a deep grunting (呼噜的) sound.

    The mothers and babies talk in soft clicking sounds. If they get scared they may scream like a baby. The koala is also an excellent swimmer.

    They are able to cross rivers to escape from heavy flooding (泛滥).

    The biggest influence that technology has on family time is the change of it. People used to spend more time with their family members before. Nowadays, with children (and the parents, too) spending more time texting, watching movies and television, playing video games, and listening to music, when will the family find time to bond (培养感情) and create lasting memories together?

    Far too often we don't pay more attention to making time for members of our own family. By the end of a long day at work or school, members of the family want to relax. And now that technology use is widespread across the country, normally our "relaxing" is also known as spending time on smart phones.

    Not only is the amount of family time affected (影响) by technology, but also the quality. Technology can affect the quality in different ways. For example, family members can be distracted (使分心) by their phones while trying to play a board game together, which wouldn't  have happened if the phone didn't exist in the first place.

    If "family time" means everyone sitting in the same room while playing online, what value is there? Personal interaction is key to time well spent with loved ones. Families don't even need to have something to do while together. If they simply ask each other how their day is and play a simple game together, family bonds will get better.

    When technology becomes a focus, quality(有质量的) time for families goes down, which in turn affects everyone's life. Lack of family interaction causes the family's unity to weaken, and each of the family will be influenced in different ways. Children are more likely to develop unhealthy habits when they fail to interact with their parents. Meanwhile, parents who put work before family or pay less attention to their children's growth are more likely to face bad parent-child relationship. 67 percent of American teens say they want to spend more time with their parents, which is rather sad. Therefore, this passage is meant to show how technology has negatively influenced families.

    A fish that lives in America can live out of water for months at a time, similar to how animals got used to land millions of years ago, a new study shows.

    The Mangrove Rivulets, a kind of little fish, lives in small pools of water. When their living place dries up, they live on the land, said Scott Taylor, a researcher in Florida.

    The fish can grow as large as three inches. They group together and breathe air through their skin before they can find water again.

    The new scientific discovery came during a trip.

    "We were travelling for fun. And one day I kicked over a log (圆木) and the fish came out." Taylor told reporters by telephone. He said he would make his study on the fish known to the public in an American magazine early next year.

    In lab tests, Taylor said he found the fish can live up to 66 days out of water without eating.

    Some other fish can live out of water for a short period of time. The walking catfish found in Southeast Asia can stay on land for hours at a time, while lungfish(肺鱼) found in Australia, Africa and South America can live out of water, but only in a not active(活跃的) way. But no other known fish can be out of water as long as the Mangrove Rivulets and keep active, according to Patricia Wright, a biologist at a Canadian University.

    More studies of the fish may tell how animals changed over time.

    "These animals live in conditions similar to those millions of years ago, when animals began to move from water onto land." Wright said.

    The world uses about a thousand million (百万) tons of water a day. Water is a human right and everyone should have their share. Yet more than 700 million people around the world have trouble getting clean, safe water.

    Treating wastewater is a good way to provide fresh water for us. And it also helps the environment by keeping waste out of rivers and oceans. 80% of wastewater around the world is not treated at all, and it is running into oceans. But now we have got the technology to treat and reuse the wastewater.

    While 75% of our planet is covered with water, only about 2% is fresh water—that comes from rivers, lakes, ice and snow. The rest, 98% of the water, is in seas and oceans. It is too salty to drink. Then desalination businesses come in. More than 19,000 factories have been built around the world, mostly in coastal countries. They process (加工) more than 92 million tons of water every day. But the technology they use requires a lot of energy.

    Scientists are working to create a less costly technology. They want to produce 20 times more clean water and make sure everyone has enough. But for now, the world still faces each day with not having enough water for everyone.