Question

Bill is an _______ boy. A．eight years old B．eight-years-old C．eight-year-old D．eight-y

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。