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.

    In the United States, headmasters and teachers discipline(惩戒) students in several ways. The teacher often writes or {#blank#}1{#/blank#} the student's parents. Sometimes students have to stay at {#blank#}2{#/blank#}for an extra hour. If a student behaves {#blank#}3{#/blank#}, the headmaster can suspend (勒令…休学) the student. The student cannot come to school for one, two, or three days, Sometimes, when the headmaster suspends some students, they are {#blank#}4{#/blank#}. "A three-day vacation!" they thought.

    Mr Lazares, a headmaster, didn't like to suspend students. When the boy who was not behaving well in class was sent to his {#blank#}5{#/blank#}, Mr Lazares telephoned the boy's parents. "If you come to school with your son, I won't {#blank#}6{#/blank#} him having classes," he said. The boy's father came to school and went with his son to every {#blank#}7{#/blank#}. Other students stared at the boy and his father. The boy was embarrassed. After that, he behaved better.  He didn't want his father to come to school {#blank#}8{#/blank#}. Other students behaved better, too. They thought, "I don't want my {#blank#}9{#/blank#}to come to school!"

    That year, about 60 parents came to school with children who didn't behave well. The next year, {#blank#}10{#/blank#}parents had to come to school. The students were behaving better.