听音，填空完成海报 Keep the air clean
The air in Garden City is {#blank#}1{#/blank#}
The {#blank#}2{#/blank#}．from cars and factories makes the air terrible．
·We should ride bicycle {#blank#}3{#/blank#}．often．
·We should {#blank#}4{#/blank#}．more trees．
Air is important to all of us．It keeps us {#blank#}5{#/blank#}．
