Question

Bill is an _______ boy.

A．eight years old	B．eight-years-old
C．eight-year-old	D．eight-year-olds

Answer 1

C

表示多少岁数修饰名词，可用两字符将每个单词连在一起，不可使用复数形式，相当于一个形容词，故本题选C。