问题
选择题
You can see a man in the photo.[ ]
A. 21 years old
B. 21-years-old
C. 21 year old
D. 21-year-old
答案
答案：D
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You can see a man in the photo.[ ]
A. 21 years old
B. 21-years-old
C. 21 year old
D. 21-year-old
答案：D