1.Are you working on the computer?Yes,I am.(肯定）
2.Is Li Ping in Class One,Grade Six?No,he isn't.(否定）
3.Are they going to have a picnic next Sunday?No,they aren't.（否定）
4.Dose your mother like the dress?Yes,she does.(肯定）
5.Are there any cats on the bed?No,there aren't.否定）
6.Do you need a cup of milk?Yes,I do.(肯定）
7.Did she read a book last night?Yes,she did.(肯定）
8.Is it cool in fall?No,it isn't.(否定)