问题
选择题
Many species of animals are in danger of ________ due to the pollution these days. [ ]
A. dying out
B. dying away
C. dying off
D. dying down
答案
答案：A
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Many species of animals are in danger of ________ due to the pollution these days. [ ]
A. dying out
B. dying away
C. dying off
D. dying down
答案：A