5th, 12th, 20th and 30th

有沒有同學在 "the 5th, 12th, 20th or 30th" 生日的呢?
你們知道這四個英文字的拼寫嗎? 請選出正確答案。

1. 5th: A. fiveth B. fifth
2. 12th: A. twelveth B. twelfth
3. 20th: A. twentyth B. twentith C. twentieth
4. 30th: A. thirtyth B. thirtith C. thirtieth

其實記法很簡單,只要記著 "-th" 像個兇惡的女巫, 不單會趕走 "-e" (nine -> ninth), 當 "她"遇上 "-ve" 和 "-y" 時, 還會施展以下魔法:
(1) ve -> f
(2) y -> ie



所以, "five" (5) 和 "twelve" (12) 會分別變成
"fifth" (5th) 和 "twelfth" (12th),
而 "twenty" (20) 和 "thirty" (30) 則分別變成
"twentieth" (20th) 和 "thirtieth" (30th)!