The "green" car has become popular in recent years. A green car is an environment friendly car. Today, most cars are powered (驱动) by petrol (汽油). They make our life easier. But cars have also made problems for the environment.

    There are a few new types of cars that use no petrol or a little petrol.

    Electric cars：This kind of car uses a battery (电池) for power. When you're not driving it, just plug it in like a mobile phone to power up the battery. They don't make exhaust (排放物). But car makers still can't make a battery that lasts for more than a few hours. That's why electric cars aren't very popular.

    Fuel cell cars (燃料电池车) : Fuel cell cars use hydrogen (氢) and oxygen (氧) to make power. The only exhaust they produce is clean water. But fuel cell cars are still much too expensive to make.

    Solar cars : This kind of car has large panels (板) on the top that take power from the sunshine. The car holds that power in a battery. Solar cars might be the cleanest of all. But no one uses them, because solar panels can't get enough power from the sun to make a car go for a long time. Also, they are very slow.

    Hybrid cars（油电混合车）： This kind of car is the most exciting kind, because it is very clean and not too expensive. The hybrid car is very smart: Half the time, it uses petrol, and half the time it uses a battery. So, when the petrol engine is working, it puts some of its power back into the battery. It uses much less petrol than other cars. It also makes less pollution for the environment.

    Mr. Guo is a teacher from Xi'an. He asked his students to hand in their homework through a QR code(二维码). "We spent an hour or two in class learning how to generate(使产生) the codes, and in the end everything gets easier." Said Guo, "When students finish the homework, they keep it on WeChat. Then, each student makes his own QR code and gives it to me. So I can check their work anywhere using my computer or telephone."

    The QR codes can be sent to Mr. Guo by email, QQ and WeChat. When Guo scans(扫描) his students' QR codes, their homework appears on his phone. He finds that their homework becomes more creative, with many pictures, music and even videos.

    Guo's students like the new way and think it is interesting. "We are living in the information age. Many students like to work with computers, which makes learning more fun." Said Tingting, a student of Guo's. "The paper is not easy to keep, but the code is easy to keep and share." Guo said, "It is worth trying to use new technology in education. Education itself is a kind of creation. I don't want my students to fall behind the times."

    However, some parents are worried. They are afraid that their children will spend too much time on computers and less time communicating with teachers. But in fact, it's unnecessary. Students still need to look up information in books and write it down when they do their homework. They only use the codes when they hand in their work, which doesn't take them too much time. Also for teachers, it allows them to check the students' work at any time. And it's also an easy way to share homework with other students.

A. Fill in the price and the password carefully.

B. Use your smartphone to scan the "Alipay QR code(二维码)"

C. Add a bank card and enter your card information.

D. The payment completion page is shown after you click the “pay” button.

E. Get the app of Alipay. Sign up with your mobile phone number, then set a password.

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    John, a farmer, was riding his cart(运货马车)along the country road. He had to arrive at the market early so that he could sell his vegetables. It rained heavily the day before, so it was very difficult for the horse to move on in the mud(泥). {#blank#}1{#/blank#}

    It was more difficult for the horse to move the cart. John climbed down from his seat and stood beside his cart.{#blank#}2{#/blank#} He felt really sad. But he didn't try to pull the wheels up by himself. Instead, he looked up at the sky and started shouting, "I am unlucky! {#blank#}3{#/blank#}"

    After some time, an old man walked by. "Do you think you can move the cart by simply looking at it and shouting?" he asked. "Did you try to get the wheels out of the mud by yourself? {#blank#}4{#/blank#} Come on, put your shoulder(肩) to the wheels, and you will soon find the way out."

John did as the old man said.{#blank#}5{#/blank#} John learned his lesson. He thanked the man and went happily on his way.

    Come to meet the family. This is a picture of my family. The man is my father. He is a policeman. The woman is my mother. She is an English teacher. They have a son and a daughter. The boy is me. My name is Lin Tao. I'm eleven. I'm a student. The girl in a hat is my sister. Her name is Lin Ying. She's eleven, too. We're twins. We look the same. We're in the same class. We are good students. We like our family.