问题
选择题
Don't worry about him. After all, he is a ______ boy. [ ]
A. seventeen years old
B. seventeen-years-old
C. seventeen-year-old
D. seventeen-year-olds
答案
答案：C
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Don't worry about him. After all, he is a ______ boy. [ ]
A. seventeen years old
B. seventeen-years-old
C. seventeen-year-old
D. seventeen-year-olds
答案：C