Life today has brought about new problem. One of the biggest problems of every nation is pollution. In America, there are laws {#blank#}1{#/blank#} the air and water clean. These are new laws and it has taken much time{#blank#}2{#/blank#} a polluted river or lake. Now the fish are healthy again and people can enjoy {#blank#}3{#/blank#} in the clean water. 
   When food is brought from the store to the home, it is packed in paper, glass, or plastic. Every day a newspaper comes to the home. Americans use {#blank#}4{#/blank#} all these materials in the garbage which was picked up by a large truck. The truck these materials to a garbage dump or a land-fill. The truck dumped the garbage into a large hole and then earth was pushed over the garbage until the hole was filled. Then, a new hole must be found.
As the years went by, the garbage increased as the population {#blank#}5{#/blank#} . Scientists suggested using some garbage again. They advised businessmen {#blank#}6{#/blank#} money by recycling or using paper, glass, and plastic again.
   Now, a recycling truck comes to each home once a week {#blank#}7{#/blank#}  up materials. American families are told {#blank#}8{#/blank#} their newspaper in boxes and clean all glass, and plastic. The truck takes them to factories for recycling.
   Recycling is a way {#blank#}9{#/blank#} the environment from pollution by {#blank#}10{#/blank#}  many materials again.

   If you have a mobile phone，the Internet could always be with you．And that is often a good thing．You can use the Internet for{#blank#}1{#/blank#}，learning and talking with your mends．But the Internet can also be a{#blank#}2{#/blank#}place．The good news is that it really isn't too hard to protect {#blank#}3{#/blank#}．Following these tips(小窍门)will let you enjoy the Internet and keep you safe．

    Take control of your personal information．First，don't{#blank#}4{#/blank#}too much online．For example，don t put your phone number or real{#blank#}5{#/blank#}on the Internet．Second，make sure you know who is{#blank#}6{#/blank#}your personal information．Don't let everyone see everything you put on the Internet．

    Be careful of strangers．It can be fun to meet interesting and{#blank#}7{#/blank#}people on the Internet，but be careful．Some children have found themselves in a dangerous situation{#blank#}8{#/blank#}they agreed to meet online friends in real life．

    Use your time online to make the Internet a better place．Don't say things that will{#blank#}9{#/blank#} other people.Don't send rude{#blank#}10{#/blank#}．And delete(删除)people who are often rude．

    Emily has so many {#blank#}1{#/blank#} in her family. She has to do her homework {#blank#}2{#/blank#} school. She can't go out {#blank#}3{#/blank#} school nights. She has to wash the dishes after dinner，and then she can watch TV {#blank#}4{#/blank#}half an hour. She likes {#blank#}5{#/blank#}. She usually reads at night. She has to be in bed {#blank#}6{#/blank#} ten o'clock because she has to get up {#blank#}7{#/blank#} the next morning. She {#blank#}8{#/blank#} a music club.

    She has to {#blank#}9{#/blank#} her guitar every day. She doesn't think she's {#blank#}10{#/blank#}.

    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.