问题描述： We should plant more trees to make the air_____.(clean)急 1个回答 分类：英语 2014-09-21 问题解答： 我来补答 We should plant more trees to make the air_____.(clean)就是用:clean或是fresh (但不知是否准改写)We should plant more trees to make the air clean / fresh.(clean)很希望我的回答会对你有帮助.如有不明白,可以再追问,并祝你进步! 展开全文阅读
