On a hot summer day, there are few things that are more wonderful than a nice cool pool.

    {#blank#}1{#/blank#}And it is completely relaxing. Of course, if you have children, there are certain measures you should take to keep them safe, whether you have a pool in your backyard or you are going to a public pool.

    People should never swim by themselves. Actually it only takes a second for people to become injured and drown(溺水). {#blank#}2{#/blank#}This is especially true for young children.

    Splashing(玩水) is fun, but don't take it too far. {#blank#}3{#/blank#}Kids love to go after one another through the water and to splash and jump around. But it is important to teach children not to jump on top of one another and to watch their surroundings in the water, so that they do not accidentally knock into others.

    If you have a pool, you must have a locking gate around your pool. {#blank#}4{#/blank#}Keep the gate knocked at all times, even when you are in the pool.

    Know the way out. {#blank#}5{#/blank#} Make sure that they know where all ladders are and how to enter and get out of the pool properly. Although your children may be able to lift themselves out of the pool using the side, that is not the safest way to go.

A.Kids should be taken good care of when they are swimming in the pool.

B.This is to prevent children from entering your pool without your knowledge.

C.And having someone there with you can make the difference between life and death.

D. Be sure to show all children the proper way to get out of the pool.

E.Even so, attempt to avoid getting any pool water into your mouth.

F. Jumping into the water seems like the perfect way to deal with the heat.

G. .Playing around in the pool can be a lot of fun.

The Square

    Jack Dorsey, the co-inventor of Twitter, is promoting his latest invention called the Square. The square is a small plug-in attachment to your mobile phone that allows you to receive credit card payments.

    The idea starting from Dorsey's friend Jim McKelvey who was unable to sell some glass work to a customer because he couldn't accept a particular card being used.

    Accepting credit card payments for something you're selling isn't always easy, especially if you are mobile like a tradesman, or delivery service at a trade show.

    This latest invention uses a small scanner that plugs into the audio input item on a mobile device. It reads information on a credit card when it is swiped(刷卡). The information is not stored on the device but sent over secure channels to banks. It basically makes any mobile phone a cash register for accepting card payments.

    As a payer, you receive a receipt via email that can be instantly accessed securely online. You can also use a text message to authorize payment in real time. Retailers can create a payer account for their customers which speeds the payment process. For example, a cardholder can assign a photo to their card so their photo will appear on the phone for visual identity confirmation. Mobile devices with touch screens will also allow you to sign for goods.

    There are no contracts, monthly fees, or hidden costs to accept card payments using Square and it is expected the plug-in attachment will also be free of charge.

    As with Twitter, it's expected that Dorsey will direct the company based upon feedback from users. Square Inc. has offices in San Francisco, Saint Louis and New York and is currently beta testing the invention with retailers in the United States.

    Drive through any suburb in the U.S. today,and it's hard to miss the bins that have become companions to America's trash cans.Recycling has become commonplace,as people recognize the need to care for the environment. Yet most people's recycling consciousness extends only as far as paper,bottles,and cans.People seldom find themselves facing the growing problem of e-waste.

    E-waste rapidly increases as the techno-fashionable frequently upgrade to the most advanced devices,and the majority of them end up in landfills（垃圾填埋地）.Some people who track such waste say that users throw away nearly 2 million tons of TVs,VCRs,computers,cell phones,and other electronics every year.Unless we can find a safe replacement,this e-waste may get into the ground and poison the water with dangerous toxins（毒素）,such as lead, mercury,and arsenic.Burning the waste also dangerously contaminates the air.

    However,e-waste often contains reusable silver.gold.and other electrical materials.Recycling these materials reduces environmental problems by reducing both landfill waste and the need to look for such metals,which can destroy ecosystems.

    A growing number of states have adopted laws to ban dumping e-waste.Still,less than a quarter of this refuse will reach lawful recycling programs.Some companies advertising safe disposal（处置）in fact merely ship the waste to some developing countries,where it still ends up in landfills.These organizations prevent progress by unsafely disposing of waste in an out-of-sight,out-of-mind location.

    However,the small but growing number of cities and corporations that do handle e-waste responsibly represents progress toward making the world a cleaner,better place for us all.

    Reading can be a social activity. Think of the people who belong to book groups. They choose books to read and then meet to discuss them. Now, the website BookCrossing.com turns the page on the traditional idea of a book group.

    Members go on the site and register the books they own and would like to share. BookCrossing provides an ID number to stick inside the book. Then the person leaves it in a public place, hoping that the book will have an adventure, traveling far and wide with each new reader who finds it.

    Bruce Pederson, the managing director of BookCrossing, says “The two things that change your life are the people you meet and books you read. BookCrossing combines both.”

    Members leave books on park benches and buses, in train stations and coffee shops. Whoever finds their book will go to the site and record where they found it.

    People who find a book can also leave a journal entry describing what they thought of it. E-mails are then sent to the BookCrossers to keep them updated about where their books have been found. Bruce Pederson says the idea is for people not to be selfish by keeping a book to gather dust on a shelf at home.

    BookCrossing is part of a trend among people who want to get back the “real” and not the virtual(虚拟). The site now has more than one million members in more than one hundred thirty-five countries.

Can you imagine there being a community where boys and girls growing up together can finally speak different languages? In Ubang Nigeria, it really happens. It's not exactly clear what percentage of the words in the men's and women's languages are different, but there are enough examples to make sentences sound different when spoken by the opposite sex. For "clothing", men use the word "nki", while women say "ariga"; "kitchi" means tree for men, while women say "okweng". These are not just some slight pronunciation differences, but totally different words. "It's almost like two different lexicons (词汇集)," a language expert, Chi Chi Undle said. "There are a lot of words that men and women share in common, but there are others which are totally different depending on your sex. They don't sound alike, and don't have the same letters. They are completely different words."

Interestingly, both men and women are able to understand each other perfectly in Ubang, as both boys and girls grow up around their parents and get to learn both languages, but by the age of 10, boys are expected to speak in the male tongue. It seems that there is a stage the male will reach and he discovers he is not using the rightful language. When he starts speaking the men's language, you know the maturity is coming into him.

No one really knows how or why the double-language tradition of Ubang began. Chi Chi Undie believes the two languages are the result of a "double-sex culture" where men and women operate in two separate spheres (范围) and live in separate worlds that rarely come together. However, she admits this is a weak theory, as the double-sex culture is present in many parts of Africa, where there are no different languages for men and women.

Today, with English words constantly entering the lexicon of young Nigerians, Ubang's two languages are in danger of being lost forever. Worse still, neither the male nor female language is written down, so they both rely on young people passing them down to the next generation.

The "Great Green Wall of China" project is over forty years old. In this project, people plant trees in {#blank#}1{#/blank#} part of China. Why are trees so important to us?

Because it is healthy to live around trees. They can keep us {#blank#}2{#/blank#}, just like doctors. So we call them "doctor trees".

Trees can clean the air. For people in large cities {#blank#}3{#/blank#} air pollution, trees can be very important. Workers are {#blank#}4{#/blank#} trees not just in city parks {#blank#}5{#/blank#} also along streets to help clean the air.

Some {#blank#}6{#/blank#} think that trees not just help clean the air. They are also good for our health. A study {#blank#}7{#/blank#} that people in hospitals feel better when {#blank#}8{#/blank#} trees from their rooms. And people with trees near their homes usually exercise more.

Scientists are also studying the healthy effects (作用) of trees on human minds. One effect of trees is that they make people feel happy and {#blank#}9{#/blank#}. When people go through the neighborhood with more trees, they will walk slower and talk {#blank#}10{#/blank#} often with each other.

Of course, another good effect is that "doctor trees" work for free! Writing 3