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、extinction
B、migration
C、destruction
D、extraction
答案A
解析 逻辑关系题：因果。物种数量本已很少，再加上环境恶化和大规模的狩猎，它们面临的应该是物种灭绝的威胁。[A]extinction“灭绝”符合题意。[B]migration“移民”、[C]destruction“破坏”、[D]extraction“抽出，提取”均与句意不符。
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大学英语六级

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