题干
听音，填空完成海报
Keep the air clean
The air in Garden City is ____
The ____．from cars and factories makes the air terrible．
·We should ride bicycle ____．often．
·We should ____．more trees．
Air is important to all of us．It keeps us ____．
答案(点此获取答案解析）
dirty,smoke,more,plant,alive
