Is the air in your city clean?（实答）

Is the air in your city clean?（实答） IS the air fresh or clean go your city? 这句话的英文回答In the air fresh or clean in your city? Trees can help _____ the air in the city.A to clean B clean there is less air pollution than in the city How is the weather in your city? Is the traffic ( )in your city? 英语高手来看Open the window to make the air in your room clean 这个句 lark in the clean air 的意思 the air in the c______ is nice and clean now many people in 英语选择（ ）is nice and clean.A.The air today B.The air of today you should (keep the air clean and fresh) in your room.