Помогите пожалуйста! Очень нужно! Нужно воткнуть -ing или to. Last

Помогите пожалуйста! Очень нужно! Необходимо воткнуть -ing либо to.
Last night I heard car brakes 1. screeching (screech) and people 2. ______ (shout) in the street. When I looked out of the window I saw a crowd of about twenty people 3. ______ (stand) around a young boy 4. ______ (lie) in the street. Next, I saw the driver of the car 5. ______ (approach) the crowd and 6. ______ (kneel down) by the boy, he was 7. ______ (look) very anxious. 8. ______ (watch) the drama from my window, I began 9. ______ (consider) the boy's family. Then a few minutes later, I saw a young woman 10. ______ (run) towards the scene and 11. ______ (push) her way through the crowd. Soon, I heard an ambulance siren 12. ______ (scream) in the distance, 13. ______ (get) closer and closer. Then I saw the ambulance stop in front of my house. I watched the ambulance men 14. ______ (get out) and 15. ______ (run) to the injured boy. Minutes later I saw them 16. ______ (run back) to their ambulance with the boy on a stretcher followed by his mother.