根据上下文,写出句中所缺的单词。

  1. --_______ ________ have a banana ?

       --Yes , I do .

  2. --Do you have a basketball ?

       --No , _______ ______ .

  3. --_______ Mary have a sister ?

       --Yes , she ________ .

  4. --_______ go to play football .

       --That sounds interesting .

  5. --_________ _______ have a computer ?

       --Yes , they do .