2. 外语
  3. A.Other threats to the Bering sea B.Pollack—the most important kind o fish C.The problems many counties face D.How to protect Be

A.Other threats to the Bering sea B.Pollack—the most important kind o fish C.The problems many counties face D.How to protect Be

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问题 A.Other threats to the Bering sea
B.Pollack—the most important kind o fish
C.The problems many counties face
D.How to protect Bering sea
E.Over-fishing destroys the food chain
F.Why to control fishing
*
选项
答案C
解析 题干中出现被动语态，所以有by的选项最有可能是正确答案。
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