D

    You don't need to get in a time-travelling machine to see how technology will change our lives, such as the way we shop. Several new technologies that are to change your buying habits already appear. Let's see what's in store for your future shopping.

    Try it on, virtually（虚拟地）. Want to shop online for a new pair of glasses? You don't need to guess which pair looks best on you—use the eBay Fashion iPhone app to try a pair of glasses you're checking out on a picture of your face. But what about buying something bigger? Thanks to Microsoft Kinect's action tracking（跟踪）camera, you can cover clothes on your screen body. You can even choose the background of your virtual fitting room to improve your shopping experience.

    Get a perfect, custom fit. Everyone's body is shaped differently. To get a perfect fit, you sometimes have to get your clothes changed. But by using 3D scanning technology, all the clothes you buy will fit your body perfectly. Some companies scan（扫描）your body using High-tech to get the real sizes, so they can make special clothes just for you.

    High-tech shopping carts（推车）and checkout counters（收银台）. High-tech shopping carts could be common in malls and supermarkets in the future. Microsoft Kinect-enabled carts are under test. The cart can follow you along the aisles（通道）, controlled only by your movement and your voice.

    In the United States, several supermarkets use a certain set called “Scan It” that gives buyers the freedom to scan products on their own while they shop. If we don't want to wait in line before the checkout counters, we can use Toshiba's new object Recognition Scanner. The machine identifies（辨认）a product as soon as it's placed in front of a camera just by its shape and color, even if it has no bar code.

B

    All over the world in the twenty-first century, people can get new energy in many ways.

    Energy from the wind. People use the power of the wind．It is a clean source(来源) of energy, and there is lots of it. However, if the wind does not blow, there is no wind energy.

    Energy from the water. When water moves from a high place to a lower place, it has the power to make electricity. Waterpower produces enough energy for 40, 000 people in a town. Waterpower gives energy without pollution. However, people have to build dams(大坝) to use this energy, and building dams is very expensive.

    Energy from the earth. There is heat in the rocks under the earth. Scientists use the heat to make geothermal(地热的) energy. San Francisco gets half of the energy from geothermal power. This kind of energy is cheap, but it is only possible in a few places in the world.

    Energy from the sun. Solar panels(太阳能电池板) on the roofs of houses and buildings can turn energy from the sun into electricity. These panels can create enough energy to heat the whole house during winter. Solar power is clean and plentiful(丰富的), but when the weather is bad, it can't produce power．

    Now, it seems that artificial intelligence (人工智能) is becoming more and more popular in life, and it has greatly influenced the ways we live, work and play. Can you imagine that you can play table tennis with a robot one day?

    Recently, a scientist has invented a special robot that can be a table, tennis coach. That means people can practice table tennis not only with humans but also with a robot.

    Named Forpheus, the smart table tennis robot is quite special. It can study the movements of human players and the speeds of the ball. In this way, it can exactly judge(判断) the players skill levels(KF). Then it uses the information to change the ways to play. If the players are just beginners, Forpheus will play in a slow and easy way, but if the players are better ones, the robot will play in a faster and more difficult way. What's more, while playing, it encourages players to try their best with words like "Good job!" ," Come on!" and so on. At the same time, it gives some good chance to improve their skills. So it is both a good partner and a clever coach. Science and technology is developing quickly these days and it's hard to imagine what will happen in the future. "In the next 20 years, it will be possible that one robot teaches another to play table tennis or even invents another one!" Takuoya, the inventor of the robot, said.

 With the rapid extinction(灭绝) of many wild species(物种), more and more people come to realize the great importance of wildlife protection.

 We have to understand the problem in {#blank#}1{#/blank#} new way: we protect ourselves by protecting. wildlife. On the one hand, any species of wildlife helps to keep the ecological balance(生态平衡){#blank#}2{#/blank#} one species becomes extinct, it will disappear forever. What is more, it {#blank#}3{#/blank#} (result) in the extinction of a chain(链条) of wildlife, which may lead to unexpected disasters. {#blank#}4{#/blank#} the other hand, the modern science and technology makes it possible for {#blank#}5{#/blank#} to learn more about wildlife. So far, scientists {#blank#}6{#/blank#}(find) that wildlife has unknown genetic codes(遗传密码), which may tum out to free human beings from serious diseases and {#blank#}7{#/blank#}(nature) disasters in the future.

 It is necessary for us to protect wildlife {#blank#}8{#/blank#}immediate before it is too late, although man has already polluted the environment and threatened the existence of many wild species. Let's take {#blank#}9{#/blank#}(act) to protect wildlife. {#blank#}10{#/blank#}(Jearn) to live in harmony(和谐) with all wildlife is part of modern civilization.

Friends can do things together. A friend can play with you and laugh with you. A friend can help you solve a problem. {#blank#}1{#/blank#} Friends are important to everyone. Here are some ideas to help you better understand friends.

Being the Same

Friends are the same in some ways. {#blank#}2{#/blank#} For example, Mary and Bill both like to draw. That is how they are the same.

Being Different

{#blank#}3{#/blank#} Friends may look different or have different ideas. Ryan is tall, butLee is shorter. That is how they are different.

Staying and Leaving

Sometimes friends get to stay together. They may live on the same street or go to the same school. But sometimes friends have to say goodbye. {#blank#}4{#/blank#}

Old and New

Some friends are old friends. You may know an old friend for a long time. {#blank#}5{#/blank#} One way to make friends is to join a club to meet new people.