1. Does she know the password?-Yes,she does.
2. Does she study art?-Yes,she does.
3. Does he often fly to Moscow?-Yes,he does.
4. Is he flying to Moscow?-Yes, he is.
5. Is there a ticket on the desk?-Yes,it is.
6. Am i doing my homework?-Yes, i am.
7. Do i do my homework after lunch?-Yes, i am.
8. Will i do my homework after lunch?-Yes, i will.