Correct

〔英語笑話〕——  Teacher：Henry, which three words are often in class,

                do you know ?

                Henry：I don't know.

                Teacher：Correct ! Sit down, please.

                               

答對了

〔意譯成詩〕——  經常使用三個字，快把詞句說出來。

                學生答言“ 不知道”，就是此句答對了。