2. 外语
  3. Many rare species of plants and animals are threatened with ______ with the worsening of environment and mass hunting.

Many rare species of plants and animals are threatened with ______ with the worsening of environment and mass hunting.

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问题 Many rare species of plants and animals are threatened with ______ with the worsening of environment and mass hunting.
选项 A、migration
B、extinction
C、distinction
D、distraction
答案B
解析 逻辑关系题：因果。句中后一个with引起的介词短语构成前面部分的原因；be threatened with是惯用表达方式，相当于be likely to be harmed or destroyed by，threaten一词也暗示了所填词的消极意义。选项中只有[B]extinction“(生物等的)灭绝”含有消极意义，符合题意要求。[A]migration“迁徙”，[C]distinction“差别，特性”，[D]distraction“困惑，娱乐，分心”。
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大学英语六级

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