题目内容
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[单选题]
Cats have been（）to check whether they have sensitive hearings.
A.conducted
B.experimented
C.done
D.used
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A.conducted
B.experimented
C.done
D.used
如果结果不匹配，请 联系老师 获取答案
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