yearsold是什么意思,years是什么意思

since i was ten years old. 2.
how old are you i'm ___ years old.
unit2i'mwanglinglingandi'mthirteenyearsold教学课件新版外研版ppt
i'm twelve years old. 4. i'm in class one. 5.
unit1it'smorethan2,000yearsold.