Ответ:
11. i haven't cleaned my room.
12.no they haven't.
13.have she sicked.
14.have he swum in the ocean.
15.they haven't arrived.
16.where have they.
17.we have lived for a year.
18.what has he done.
19.it hasn't rained for a long time.
20.who has finished the homework.
Объяснение: