11到20之内的序数词

问题描述:

11到20之内的序数词

从第1至第二十依次是:first secondthirdfourthfifthsixthseventheighthninthtentheleventhtwelfththirteenthfourteenthfifteenthsixteenthseventeentheighteenthnineteenthtwentieth