1. is writing
2. has already written
3. writes
4. What are they doing now?
are filling
5. Have they filled..
6. fill
7. are talking
8. has already told
9. is blowing
10. is plotting
11. is having ; has already plotted
12. plots
13. is demonstrating
14. has already demonstrated
15. demonstrates
Объяснение:
1. is writing
2. has already written
3. writes
4. What are they doing now?
are filling
5. Have they filled..
6. fill
7. are talking
8. has already told
9. is blowing
10. is plotting
11. is having ; has already plotted
12. plots
13. is demonstrating
14. has already demonstrated
15. demonstrates
Объяснение: