As the air is being polluted，many kinds of wild animals are________.


  1. A.
    died
  2. B.
    dying down
  3. C.
    dying out
  4. D.
    death
C
這題考查固定詞組：die out“滅絕”句意是：因?yàn)榭諝獗晃廴玖�，很多野生�?dòng)物正在滅絕。選C。
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