1.Are you going to vist the History Museum?
Yes,I am.
No,I am not.
2.Did your two brothers go fishing one day?
Yes,they did.
No,they didn't.
3.Are the twins climbing the tree now?
Yes,they are.
No,they are not.
4.Does he have a lovely dog?
Yes,he does.
No,he doesn't.
5.Is there any ink in the bottle?
Yes,there is.
No,there is not.