1. Where does your brother work? He works at an institute. 2. Was your grandmother sleeping when you came home yesterday? 3. What will your brother do tomorrow? 4. I did not go yester¬day. I shall go to the shop tomorrow. 5. Where was Kate going when you met her yesterday? 6. Look at these children: They are skating very well. 7. Did you skate last Sunday? Yes, we were skating the whole day last Sunday. We shall skate again next Sunday. 8. My brother can skate very well. He skates every Sunday. 9. What are you doing now? I am washing the dishes. 10. What were you doing at three o’clock yesterday? I was having dinner. 11. Are you having dinner now? 12. Every day the boss enters he office at nine o’clock. 13. Yesterday the boss entered the office at half past nine. 14. When will the boss come tomorrow? 15. At six o’clock yesterday we were listening to a very interesting lecture. 16. When I entered the office, the secretary was typing.