Answer:
1. will
2. is going to
3. will
4. will
5. am going to
Step-by-step explanation:
1. If I'm rich, I'll purchase a home with a huge garden. In this phrase, "will" means a future action based on existing circumstances. Buying a house with a huge garden requires a lot of money.
2. A: Does your best buddy like studying? B: She's not. She'll switch topics. The word "is going to" alludes to a planned activity. Changes in study subjects indicate planning or decision-making.
3. Current weather: overcast. David: I expect rain. This context uses "will" to predict the future based on the speaker's viewpoint. David expects rain owing to the dismal weather.
4. Will you join us in the theatre? Clara: I want to join you. A view or opinion is utilized to predict the future using "will". Overcast weather makes David anticipate rain.
5. A: What is your semester plan? B: Oh! A week in Cappadocia awaits me. We use "am going to" for future activities. During the semester, B planned a week in Cappadocia.