Noise pollution can make people {#blank#}1{#/blank#}  . For example, people may lose their hearing if they work in a {#blank#}2{#/blank#}  place for a long time.Too much noise can cause high blood pressure,{#blank#}3{#/blank#} .    
    Walking for a long time in a strong ,changeable light may cause some kinds of diseases. It {#blank#}4{#/blank#}  people feel terrible and is especially bad for the eyes. With less pollution, our planet will become {#blank#}5{#/blank#} and our health will be better.
Let's be greener people.

    Today, an increasing number of people are always looking at their mobile phones with their heads down. These people are {#blank#}1{#/blank#} the "Heads -down Tribe". Heads -down tribe members now can be seen everywhere.

    There are more and {#blank#}2{#/blank#} traffic accidents because lots of drivers use mobile phones while driving. In order to make drivers pay more {#blank#}3{#/blank#}to driving, some new traffic rules have been made.

    As we can see above; using mobile phones may {#blank#}4{#/blank#} traffic accidents. Also, more and more interesting and strange facts happen to the "Heads - down Tribe". A man in America kept using his mobile phone on {#blank#}5{#/blank#} way home. As a {#blank#}6{#/blank#} , he knocked into a big lost bear. When he lifted his eyes from the phone, he was so afraid {#blank#}7{#/blank#}he turned around and ran away as {#blank#}8{#/blank#} as possible. Another fact is that we can often see people in the restaurant eating face to face but looking at their own mobile phones. It's strange that they don't talk to the ones who sit opposite to them during the meal. Some of them even have {#blank#}9{#/blank#} communicating with others on the phone.

    Mobile phones are helpful and necessary tools for modern life. Whether they are good or not depends {#blank#}10{#/blank#} how people use them. Let's be "healthy" users and try to be the "Heads -up Tribe".

    When most teenagers are learning how to work out maths problems, Kelvin Doe is teaching himself to make batteries and generators(发电机)for his neighborhoods in Africa.

    Kelvin is only 15 years old, but he has already created batteries and generators {#blank#}1{#/blank#}. He used the things he picked up around the house or from litter bins to create them.

    "In my hometown, we don't have much electricity and batteries are{#blank#}2{#/blank#}, "Kelvin said. So he decided to make batteries to light up people's homes

    Kelvin also{#blank#}3{#/blank#}a radio station. He broadcasts news and plays music for the local people. The station gets its electricity from a generator also made by him.

    His next project will be a windmill(风车)for electricity supply. He wants to help more families in his hometown live a happy and{#blank#}4{#/blank#}life.