Решение:
- Sarah is flying to Japan tomorrow. (Present Continuous для запланированного действия)
- I'm tired. I think I am going to go to bed. (Be going to для намерения)
- It's so hot her. I will open the window. (Will для спонтанного решения)
- Look at him! He is going to drop that box! (Be going to для предсказания на основе очевидных признаков)
- The children are meeting their new teacher on Tuesday afternoon. (Present Continuous для запланированного действия)
Ответ: 1. is flying, 2. am going to go, 3. will open, 4. is going to drop, 5. are meeting.