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
问题描述：
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
答
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
答
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
答
答案是B.80 years old
而A.80-year-old 只能作定语,如 anA.80-year-old woman
答
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