题目内容：
This rare bird has become __ 选择一项：
a.
an endangered specie
b.
endangered species
c.
endangering species
d.
an endangered species
参考答案：
选择题：This rare bird has become __
- 题目分类：国家开放大学-开放英语4
- 题目类型：选择题
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选择一项：
a.
an endangered specie
b.
endangered species
c.
endangering species
d.
an endangered species