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题目内容
（国家开放大学开放英语）
There.s a lot of public _________ about dangerous toxins recently found in food.
单选题 (2 分) 2分
A.
concern
B.
concept
C.
conduct
D.
conflict
单选题 (2 分) 2分
A.
concern
B.
concept
C.
conduct
D.
conflict
参考答案
