2. 外语
  3. According to the author, the main problem of our environment today is ______. The passage is mainly about ______.

According to the author, the main problem of our environment today is ______. The passage is mainly about ______.

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问题 According to the author, the main problem of our environment today is ______.
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 文章主要讲述了人口的增长给环境造成的影响及如何保护环境。[A]，[C]，[D]只涉及到文章的一部分。[B]比较全面，故本题答案为[B]。
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