Heis      boy,butheknows      . A.a8-years-old;alotof  ...

问题详情：

He is       boy, but he knows       .

  A. a 8-years-old; a lot of    B. an 8-year-old; a lot

  C. an 8-years-old; a lot     D. a 8-years-old; a lot of

【回答】

B

知识点：构词法

题型：选择题