11. I havent cleaned my room.
12. No, they havent.
13. Has she sick?
14. Has he swum in the ocean?
15. They havent arrived.
16. Where have they?
17. We have lived here for a year.
18. What has he do?
19. It hasnt rain for a long time.
20. Who have finished the homework?
Если есть ошибка прости!