问题
选择题
My grandfather is _______ man. [ ]
A. ninety years old
B. ninety-years-old
C. a ninety-year-old
D. a ninety years-old
答案
答案：C
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My grandfather is _______ man. [ ]
A. ninety years old
B. ninety-years-old
C. a ninety-year-old
D. a ninety years-old
答案：C