planting trees
trees are very *ful and important for us. （树对我们人类是多么的重要和有用。）we should plant * and * trees in order to live better and * healthy in the future. （为了将来我们的生活过得更好、更加健康我们应该种更多的树。）it’s *ryone’s duty to love and protect the environment.（爱护和保护环境是每个人的责任和义务。）作
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