letter. 9. We (to gather) at our place when my brother (to come) back from Africa. 10. I (to sing) this song with you if you (to tell) me the words. 11. I hope you (to join) us when we (to gather) in our country house the next time. 12. What you (to do) when you (to come) home? 13. When they (to cross) the road, they (to see) the hotel. 14. Before she (to get) to the theatre, she (to go) past the shopping centre. 15. What we (to do) if it (to rain) tonight? 16. What she (to do) if she (to see) her best friend again? 17. If the bus (to be) very crowded, you (to be) exhausted by the time you (to get) to work. 18. If it (to be) very cold tonight, our car (not to start) in the morning.

Решение:

1. 9. We will gather at our place when my brother comes back from Africa.
2. 10. I will sing this song with you if you tell me the words.
3. 11. I hope you will join us when we gather in our country house the next time.
4. 12. What will you do when you come home?
5. 13. When they cross the road, they will see the hotel.
6. 14. Before she gets to the theatre, she will go past the shopping centre.
7. 15. What will we do if it rains tonight?
8. 16. What will she do if she sees her best friend again?
9. 17. If the bus is very crowded, you will be exhausted by the time you get to work.
10. 18. If it is very cold tonight, our car will not start in the morning.

Ответ: 9. will gather, comes; 10. will sing, tell; 11. will join, gather; 12. will you do, come; 13. cross, will see; 14. gets, will go; 15. will we do, rains; 16. will she do, sees; 17. is, will be, get; 18. is, will not start.