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

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

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

my grandma is already A.80-year-old B.80 years oldmy grandma is already_________ A.80-year-old B.80 years old选哪个为什么
答案是B.80 years old
而A.80-year-old 只能作定语,如 anA.80-year-old woman

选项A只能作定语修饰名词,并不能放在be动词后面直接作表语,所以必须选B项

A。因为A是形容词啊,如果选B的话yeas后面再加个撇就对了哈

B 因为A只能做定语。如He is an 8-year-old boy还可以说成He is8 years old