Ответ:
1. are skating
2. Did you skate/ skated/ will skate
3. skates
4. are you doing/ am washing
5. did you do/ had
6. Are you having
7. work/works
8. Was your grandmother sleeping/ camr
9. What will yor brother do
10. did not go/ will go
11.was going/met
12. enters
13. entered
14. When will the secretary come
15.listened
16.entered/ was typing
17. rang
Объяснение: