2. 外语
  3. What is the one huge problem that we haven’t really solved? There is no doubt that environmental regulation ______.

What is the one huge problem that we haven’t really solved? There is no doubt that environmental regulation ______.

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问题 What is the one huge problem that we haven’t really solved?
There is no doubt that environmental regulation ______.
选项 A、is cumbersome
B、produces an effect
C、varies wildly
D、needs to be streamlined
答案B
解析 细节题。根据题干信息词environmental regulation定位到第五个小标题末句Some environmental regulation may be too cumbersome (麻烦的) and needs to be streamlined--standards can vary wildly between regions—but there isn’t any doubt that environmental regulation actually works，即：虽然有一些麻烦，但是环境规则还是有作用的，故选B。
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