单项填空；选择最佳*。—DoyouknowMary?—Yes,Maryis

问题详情：

单项填空；选择最佳*。

— Do you know Mary?

—Yes, Mary is ______ girl, but she knows a lot about science.

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

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

【回答】

D

知识点：构词法

题型：选择题