my grandma is already A.80-year-old B.80 years oldmy grandma is a_英语解答

my grandma is already A.80-year-old B.80 years old
my grandma is already_________ A.80-year-old B.80 years old选哪个为什么

人气：216 ℃　时间：2020-02-05 15:15:04

解答

答案是B.80 years old
而A.80-year-old 只能作定语,如 anA.80-year-old woman