For over 100 years, it is convenient for people to go from one place to another by taxi. But sometimes there are no taxis coming to the place you are waiting. However, this has become a thing of past since Uber app appears.

{#blank#}1{#/blank#}

      Uber is an American company that provides a taxi service through an app on the smart phone. It was set up in March, 2009 and has grown quickly. An app, in fact, is a computer program working on smart phones, computers and other communication devices. By using your smart phone, you can easily and quickly order a taxi and takes you to the place you want to go.

{#blank#}2{#/blank#}

      The nicest thing about Uber app is that you can see where your taxi is or how long it will take to reach you on your smart phone screen. And you can also find the telephone number of the driver in Uber app, so you can call or send messages to the driver when you are waiting.

{#blank#}3{#/blank#}

      Uber is always available 24 hours a day. 365 days a year. If you want to go somewhere, you can easily open Uber app at home or anywhere in the open air, then it connects you to the nearest driver. Usually it takes only between 15 minutes to get a Uber taxi by using Uber app.

{#blank#}4{#/blank#}

      Uber is popular because it is simple and very user-friendly. You have nothing to do with a taxi company. If you are not pleased with the ride and the driver, you can give the driver a low score through Uber app, so Uber is simple, time-saving, and above all very easy.

{#blank#}5{#/blank#}

      At Uber, the payment is easy through your bank card. How much you need to pay depends on the country and the city you are in. It is sure that Uber taxis are much cheaper than taxis you used to take.

    The earth moves round the sun, and the moon goes round the earth. When our part（部分） of the earth turns to the sun, it is day, When our part of the earth turns away from the sun, it is night. The sun is much bigger than the moon. But sometimes the moon looks bigger than the sun, because it's much nearer to the earth. The sun is very bright. It gives a very strong light. The moon looks quite bright, too. But it doesn't give any light at all. The moon looks much bigger and brighter than the stars .But actually（事实上）, the stars are much bigger and brighter than the moon. They look smaller than the moon because they're much farther away from us.

    Robots come in many shapes and sizes. But most have one thing in common. They are built to help people, Lately engineers have been developing new kinds of robots. These high-tech machines are designed to lend a hand everywhere from hotels to disaster areas.

    "Robots help people by making their lives easier, safer, and more fun, "says engineer Omar.

    Since November, a robot named Pepper has been on the job at Mandarin Oriental Hotel in Las Vegas, Nevada. When guests have questions or need directions, they can ask Pepper. They can also use the robot's touch screen to find the information they need. Pepper is able to talk with guests and make them happy with stories too. It can even tell what kind of mood they are in.

    "Pepper provides our guests with information in an exciting and new way." says the hotel manager Donald Bowman.

    For a kid, being in the hospital can be boring and even scary. But a small robot called NAO is helping to make hospital stays easier. It was designed to keep people company.

    A Tennessee doctor named Phil Parker bought a NAO robot three years ago. He programmed(为…….编制程序)it to talk to and play with young patients. He brought it to hospitals to help sick kids. When kids get medical tests, NAO explains what is going on. The robot also reads to kids and plays games with them like Rock, Scissors ,Cloth(石头剪刀布).

    "The robot gets many kids to smile for the first time since they were in hospital," Parker says.

    Other robots are designed to help to save people in dangerous areas. For example, disaster areas can be full of broken stones and other dangers. Engineers in Japan are planning to build a robot called E2-DR to go into those areas and search for people who are hurt.

    Height is just one of the thousands of features that your genes(基因) decide. In fact, because you have two parents, your genes provide you a height that usually lands somewhere between the height of each parent. If both your parents are tall, then most probably you will be tall, too. But if you have questions about how tall you're going to be, ask your doctor if he or she can help you find it out.

    But genes don't decide everything. For example, eating an unhealthy diet can keep you from growing to your full potential(潜力). Getting plenty of sleep and enough exercise will help you grow to the expected height.

    No doubt you're wondering how fast you should grow. There's no perfect or right answer. Generally speaking, kids grow about two inches(six centimeters) a year between age 3 and the time when they start puberty(青春期).

    Your doctor will know how your growth has been going over the years, how you've been growing up to this point, and what other changes your body may be going through.

    Don't be scared if you seem to have grown a lot in a very short time. Everyone has a growth spurt(高峰) during puberty. The age for starting puberty is about 10 for girls and about 11 for boys. But it can be earlier or later-between 7 and 13 for girls and between 9 and 15 for boys.

    You'll usually begin to notice that you're growing faster about a year or so after your body starts to show the first changes of puberty.