According to the writer, the main problem to our environment today is ______. [b

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问题 According to the writer, the main problem to our environment today is ______. [br] The passage is mainly about ______.

选项 A、energy resources saving
B、environment protection
C、population control
D、air pollution

答案 B

解析本题询问这篇文章的主要内容是什么。由于全文是关于环境保护的问题，故选B。

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