1.
When he returns to St. Petersburg, he'll call on us. 2. If I see him, I'll tell him about their letter. 3. We'll gather at our
place when my brother comes back from Africa. 4. I'll sing this
song with you if you tell me the words. 5. I hope you'll join us
when we gather in our country house the next time. 6. What will you do when you come home? 7. If I stay some more days in your
town, I'll call on you and we'll have a good talk. 8. He'll go to
the Public Library very often when he is a student. 9. As soon as I return from school, I'll ring you up. 10. You'll pass many
towns and villages on your way before you arrive in Moscow. 11.I'll stay at home till she comes. Then we'll go to the theatre if
she brings tickets. 12. After I finish school, I'll enter the
University.