It is an honor for an__ to go to Harvard University.A,18 years old B,18-year's old C,18-year
问题描述：
It is an honor for an__ to go to Harvard University.A,18 years old B,18-year's old C,18-year
答
没有答案,因为横线后面没有名词,但如果横线后面有名词,没有应该用C.因为只有C才可以做定语.