ПОМОГИТЕ РЕШИТЬ!! Раскройте скобки, употребляя глаголы в Past Simple или Past

ПОМОГИТЕ РЕШИТЬ!! Раскройте скобки, употребляя глаголы в Past Simple либо Past Continuous. 1. At this time yesterday I (to sit) at the theatre. 2. He (to come) back to St. Petersburg on the 15th of January. 3. I (to go) to the institute when I (to see) him. 4. At this time yesterday we (to have) dinner. 5. He (to write) a letter when I (to come) in. 6. He (to make) a report when I (to leave) the meeting. 7. Yesterday he (to write) a letter to his friend. 8. When I (to look) at them, they (to smile) at me. 9. What you (to do) at six o'clock yesterday? 10. I (to go) to bed at half past eleven. 11. Yesterday the lesson (to begin) at nine o'clock. 12. The cat (to take) a piece of fish 'and then (to run) away. 13. He (to read) a newspaper when I (to come) in. 14. Yesterday I (to get) up at seven o'clock. 15. The train (to start) at fifteen minutes to ten. 16. He (to put) on his coat and cap, (to open) the door and (to go) out.