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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).

B

    Language students often think they have memory problems. They worry because they can't remember words. In fact, the problem usually isn't with their memory. The problem is with how they study.

    To remember words better, you need to understand how memory works. There are two kinds of memory: short-term and long-term. When you see, hear, or read something, it goes first into short-term memory. But short-term memory lasts for only a few seconds. You will only remember something longer if it goes into long-term memory. Your long-term memory is like a very big library with many, many books. And like a library, it's organized (有条理的). When you put away a book – or memory – you can't just leave it anywhere. You have to choose a place where you can find it again.

    How can you do this with vocabulary? The answer is to work with the word and think about the word in new ways. You can do this by writing new sentences that include it. Even better, you can invent a little story about the word, with people or places that you know. Another way is to make a picture in your mind with the word. For example, if the word is height, you can think of the tallest person you know and try to guess his or her height. All of these activities are good ways to think about words. They make the meaning of words stronger in your long-term memory. And they give a way to find a word when you need it.

    Can plants eat people? Probably not, but there are many plants that eat meat. Some of them are big. And they can eat small animals. One famous meat-eating plant is the Venus flytrap(捕蝇草).

    The Venus flytrap is a very strange plant. It grows in dry parts of the United States. Its leaves are like the pages of a book. They can open and close very quickly. Inside the leaves, there are three small hairs. If a fly touches one of the hairs, the leaf closes quickly. The fly cannot get out. In about half an hour, the leaf presses the fly until it is dead. Then, the plant covers the fly. Slowly, the plant eats the fly.

    Why do plants do it? Most plants get what they need from the sun, the air, and the ground. In some places, the ground is very poor. It doesn't have all these important things, especially nitrogen(氮). Animal meat has a lot of nitrogen, so some plants eat meat to get what they need. Let's hope that some of the bigger plants don't get the same idea!

Can you imagine a day without technology? In the last decade(十年), computer technology has become {#blank#}1{#/blank#}(广泛地) available and has rapidly made life more convenient. Nearly everyone keeps {#blank#}2{#/blank#}(他们的) smartphones close at all {#blank#}3{#/blank#}(时候). This {#blank#}4{#/blank#}(通常) comes with many benefits compared to traditional ways. For example, you can keep in {#blank#}5{#/blank#}(接触) with friends easily and access(获取) maps, news, {#blank#}6{#/blank#}(天气), {#blank#}7{#/blank#}(温度) and facts {#blank#}8{#/blank#}(任何时候) you want. However, there are also some negative aspects(方面). Digital devices and social media platforms are so addictive(上瘾的) that many {#blank#}9{#/blank#}(年轻的) people struggle to control how much time they spend {#blank#}10{#/blank#}(使用) them and they become {#blank#}11{#/blank#}(劳累的) because of that. If you're one of the addicts, don't {#blank#}12{#/blank#}(担心), it's time for you to go for a digital detox (数字排毒).

A digital detox is a {#blank#}13{#/blank#}(极好的) practice in the information age to help people stay away from {#blank#}14{#/blank#}(科技) for a period of time. It can be different for every person. Some people like {#blank#}15{#/blank#}(走) into nature and leave home {#blank#}16{#/blank#}(没有) their phones. {#blank#}17{#/blank#}(然而) others prefer to set strict limits on how and when they use technology. The purpose is just to {#blank#}18{#/blank#}(警告) people to be mindful(留心的) of how much time we spend looking at screens.

Doing a digital detox can be very helpful. Most people {#blank#}19{#/blank#}(认为) that they get better sleep and {#blank#}20{#/blank#}(醒来) up happily when they aren't exposed(暴露) to the bright light of the phone screen. Many also find that they have some {#blank#}21{#/blank#}(微小的) changes when they aren't comparing {#blank#}22{#/blank#}(他们自己) to others on social media. And of course, if you can {#blank#}23{#/blank#}(扔) away your phone for a while, you will have a lot more time for other valuable {#blank#}24{#/blank#}(事情), such as {#blank#}25{#/blank#}(旅行) {#blank#}26{#/blank#}(一起) with your families, {#blank#}27{#/blank#}(拜访) your old school on {#blank#}28{#/blank#}(周末). Enjoy the days without smartphones.

Every school has its rules. The rules are different. Here are some funny school rules in different countries.

Japanese rules

Most schools ask the students to wear uniforms, such as sports suits or skirts. In many Japanese schools, if the students don't tell their schools, they can't go to cinemas, leave home in the evening or play computer games.

Different shoes in the US

In some schools, the students must wear indoor shoes in school. So the students will not fall down, and they are safe on the floors. They can keep the schools clean, too. Students can't eat gum(口香糖), because it's hard to clean.

No strange hair in the UK

The students can't have strange hair in some British schools. But the students can wear certain hairstyles during the World Cup years.