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 .