Легко!!!
6. Don’t worry. I will not be / am not late tomorrow morning.
7. My aerobics class is starting / starts at 8 p.m.
8. The phone is ringing. I get / will get it.
9. At 11:00 she will be having / will have had her haircut.
10. By 15:30 she will be having / will have had lunch.
11. At 15:45 she will be watching / will have watched TV.
12. By 23:30 she will be going / will have gone back home.
Answers & Comments
6. Don’t worry. I will not be late tomorrow morning. (намерение в будущем)
7. My aerobics class starts at 8 p.m. (расписание)
8. The phone is ringing. I will get it. (спонтанное решение)
9. At 11:00 she will be having her haircut. (продолжительное действие в будущем)
10. By 15:30 she will have had lunch. (действие завершится в будущем)
11. At 15:45 she will be watching TV. (продолжительное действие в будущем)
12. By 23:30 she will have gone back home. (действие завершится в будущем)