Choose the best or the only possible tense to complete the sentences

Choose the best or the only possible tense to complete the sentences.1. When (do/will) our classes start tomorrow? 2. The train from Liverpool (arrives/ will arrive) at 7,30. 3. I dont think the train (arrives (will arrive) on time. Theres a heavy snowfall in Glasgow area. 4. I (will apologize/ apologize) if you (will explain/explain) to me why I should. 5. I (play /am playing) football tomorrow. 6. I (will promise / promise) I (will phone/phone) my granny.7. We (go/are going) to St.Petersburg some time soon. 8. What time (does/will) he bus arrive in Cardiff? 9. Alec (is going to write / is writing) a letter to his parents in the evening. 10. We are having a party on Saturday night . (will you come / are you coming)?