题干
I saw a ________ boy playing football in the garden.
A：ten years old
B：ten-years-old
C：ten-year old
D：ten-year-old
答案(点此获取答案解析）
D
I saw a ________ boy playing football in the garden.
A：ten years old
B：ten-years-old
C：ten-year old
D：ten-year-old
