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He is __,and he has__sister.A.ten years old,an eight-year-old B.ten-year-old,eight year old

题目详情
He is __,and he has__sister.A.ten years old,an eight-year-old B.ten-year-old,eight year old
▼优质解答
答案和解析
A.ten years old,an eight-year-old
有连字符的话,就不用复数了.