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[单选题]
A. a difficult B. a troublesome C. easy D. an easy
A.a difficult
B. a troublesome
C. easy
D. an easy
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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.a difficult
B. a troublesome
C. easy
D. an easy
如果结果不匹配，请 联系老师 获取答案
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