问题
选择题
Mo Yan, the writer, has won this year's Nobel Prize for Literature.
A．57 years old
B．57-year-old
C．57 year old
D．57-years-old
答案
答案：B
题目分析：句意：，莫言，57岁的作家，已经赢得了若贝尔文学奖。57-year-old复合形容。根据句意，故选B。
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