According to the passage, only ______ trees can give us shade and products. [br]

游客2024-07-06  12

问题 According to the passage, only ______ trees can give us shade and products. [br] People protect their environment by ______.

选项 A、cutting down unhealthy trees
B、making changes around the trees
C、cooling and cleaning the air around the trees
D、protecting the environment for trees growth

答案 D

解析 本题询问人们应该怎么做来保护环境。根据原文(38)处可知,树木有益于环境,同样树木需要良好的环境,它们是个相辅相成的过程,故选D。
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