题型：听力题 题类：常考题 难易度：困难
新版牛津上海版（深圳用）六年级上册英语Module 4 The naturalworld模块综合与测试
We all know the airus．makes the air dirty and it makes us unhealthy．Rubbish makes the land and water dirty．The dirty land and water makes us unhealthy and too．Trees make the and beautiful．Trees also give us delicious fruit and useful．We should keep the air clean and throwing rubbish into rivers, lakes or seas．We should plant trees．
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