Question

【题目】 Mary is girl, but she knows a lot about science.

A. a eight-year-old B. eight-year-old

C. eight years old D. an eight-year-old

Answer 1

【答案】D

【解析】

试题分析：句意：Mary是个八岁大的小女孩，但是她知道好多有关科学方面的事情。此题考查带有连字符的名词用作定语，中间的名词要用单数。根据句意，故选D。