Ever since I was a child，my mouth has caused me trouble．I'm not a bad person；I have just had a hard time learning when to keep my mouth closed．

My mom has told me again and again，"Robert，your constant bad words are hurting me．If you continue to be this rude，you will get into big trouble．"

    It's been a problem at school several times，too，when teachers have told me something I didn't want to hear．I used to feel it was my duty to stand up for myself and tell them ______ off．

    One day in English class I began working on my homework until I heard a classmate talking behind me．It was Nathaniel，talking to himself as usual．

I said ever so nicely，"Nathaniel，would you be quiet?"

Nathaniel continued talking to himself．I quickly shouted，"Nathaniel，shut up!"

    For the next five minutes，we threw hurtful words back and forth at each other．

"At least I don't have an ugly lazy eye like you!"I shouted．

    I knew this would bother him deep inside．It would hurt his feelings and shut him up．

What I said filled him with anger．He tried to reach over my seat and grab me as he shouted．"That's it! That's it!"

    Surprised at his reaction，I sat back in seat．Never had I seen Nathaniel act like this before．

Later on，we were taken to the principal's office．

There，the principal told US to discuss the matter．It wasn't until then that I finally found that when I hurt someone physically，the wounds(伤口)eventually heal．But when I hurt them with my words，sometimes the pain never goes away．

    At the end of the discussion，I said sorry to Nathaniel．

    When I headed back to my room，I spent some time praying． I began to think about how often what I said hurt others．But I believe that as I keep praying and asking God to help me，he'll tell me when to keep my mouth closed．

    A river was running happily in the hill, the valley(山谷) and the field. Soon it was stopped by a huge rock and the river was a little afraid and worried what it could do.

    The rock said, "Hi, baby！Where are you going？"

    The river answered, "I'm going to the sea. My mother is waiting for me."

    The rock made fun of the river and said, "You're too young. Go back to the hill at once. You can't get there. Don't come back here again!"

    The river was surprised to hear that and said, "I can only go forwards(向前).There's no river that goes backwards(向后)!"

    The rock became angry and warned the river. "Don't speak! If you don't go back, you will have to change your direction. Don't want to run over my body!"

    The river asked helplessly, "Where should I go？"

    "You can go anywhere you like. Just don't come close to me!"

    While they are talking, more and more water came here. Then it began to get out of control. The river ran quickly over the rock and the rock was washed pitifully.

    The river said proudly, "A weak person will change his goal and direction. A person who is strong will only go ahead and nothing can stop him!"

I live on a farm in Japan. My parents are farmers. These days, we meet a problem; Some bears often come to our farm. Sometimes they eat plants. Sometimes they even hurt family animals. We are all afraid of them. 

To work out the problem, we have got an idea. Bears are always afraid of big wolves, so we buy two Monster Wolf robots. They are big and strong with two red eyes. They can make sounds like real wolves do. We hope the robotic wolves can drive(驱赶) bears away.  ▲ When the bears see the wolves, they are afraid and go away. 

Now it's winter. Bears need to sleep in winter. They won't come to our farm any more in the next months. The robotic wolves will start to work again next spring. The robotic wolves help us a lot and they make our life different. And I'm really happy to have them. 

More biking, better public transport and odd-even bans on vehicles (车辆单双号限行)—many cities are using different ways to reduce {#blank#}1{#/blank#} pollution.

 Paris doesn't allow cars in many historic central places at weekends, carries out odd-even bans on vehicles, and makes public transport free {#blank#}2{#/blank#} there are serious pollution events.

Because of the serious {#blank#}3{#/blank#} in Delhi, India made the city stop all new large diesel cars (柴油汽车) and diesel taxis. The city has started odd-even bans on vehicles and is now encouraging Uber-style minibuses. Other {#blank#}4{#/blank#} like Dublin and Brussels, are also considering diesel bans.

Helsinki, capital of Finland, plans to {#blank#}5{#/blank#} cut down the number of cars on its streets by developing better public transport, raising the parking prices and encouraging bikes and walking. The government {#blank#}6{#/blank#} that in this way, no one will want a car by 2050.

Freiburg, Germany has 500km of bike routes(路线) and a cheap and {#blank#}7{#/blank#} public transport system. One town, Vauban, does not allow people to park cars near {#blank#}8{#/blank#} homes and makes car owners pay€18,000 for a special space near the town. In return for living without a car, the government {#blank#}9{#/blank#} people cheaper housing, free public transport, and many bicycle spaces.

 Copenhagen, Denmark prefers bikes to cars and now has {#blank#}10{#/blank#} bicycles than people. Large parts of the city have been closed to cars for years and the city plans {#blank#}11{#/blank#} carbon neutral (碳平衡) by 2025.

Zhou Jinrui and Harry are two middle school students in Hangzhou. They didn't have much money with them. But they have dreamed to visit Beijing for a long time. So they went to Beijing from Hangzhou by bike last summer holiday. They spent nearly one month on the bike travelling. The journey（旅程）was hard, but they felt happy. 

They went through many cities and villages during the travelling. They ate the food they took or had cheap meals. When they were tired at night, they took out their map to find small and cheap hotels or the farmers' houses to stay in. They also took some medicine with them. When they had a cold, they didn't need to go to hospital. When it was rainy, they stopped for a while and went on with their travelling. 

At the end of August, they got to Beijing successfully. They visited a lot of places of interest in Beijing, such as the Great Wall, the Summer Palace and Tian'anmen Square. 

They had a fun time in Beijing for ten days. At last, they had to return to Hangzhou by train because the new term began in September. 

Do you know Wilma Rudolph? In 1960, Wilma Rudolph became the first American woman to win three gold {#blank#}1{#/blank#}(medal) in one Olympics. She was {#blank#}2{#/blank#} unusual American player. 

Wilma Rudolph was born {#blank#}3{#/blank#} a very large, poor, African American family. She was the {#blank#}4{#/blank#} (twenty) of twenty- two children. She was born too early and only{#blank#}5{#/blank#} (weigh) about two kilogrammes. She had many illnesses when she was very young,{#blank#}6{#/blank#} (include) polio and scarlet fever(小儿麻痹症和猩红热). And the polio damaged her left leg so she couldn't walk or run like other kids. When she was six years old, she began to wear metal leg brace (支架){#blank#}7{#/blank#} she could not use that leg to stand or walk. 

Since she was sick most of the time, her brothers and sisters all helped to take care of{#blank#}8{#/blank#}(she). They took turns massaging her leg every night. They also made sure she did not try to take off her leg brace. Every week, Wilma's mother drove her to a special doctor over eighty kilometres away. There, she got physical treatment {#blank#}9{#/blank#} (help) to make her leg healthy again. She later said, "My doctors told me I would never walk again. My mother told me I would. I believed my mother. " With her family's attention and care,{#blank#}10{#/blank#}(lucky), when she was nine years old, she no longer needed her leg brace.