Пж срочно надо,дам 10 баллов

2. А : You've got my bag.
    B : No, I haven't it
    A : Yes, you have!

3. A : You don't understand!    
    B : Yes, I do!
    A : No, you don't!

4. A : That isn't true!
    B : Yes, it is!
    A : No, it isn't!