Tony is twelve old, but his sister is only one old.
A. year; year
B. years; years
C. years; year
D. year; years
网友回答
A. year; year
B. years; years
(答案→)C. years; year
D. year; years
解析：表示“年龄多大”时用“…years01d”结构。前面的基数词是one就用year old：大于1就用years old。因此选c。