Помогите пожалуйста: 5. Put the verbs in brackets into the Past Simple or the Past Continuous. 1. He … (sit) in a cafe, when I …

Помогите пожалуйста: 5. Put the verbs in brackets into the Past Simple or the Past Continuous. 1. He … (sit) in a cafe, when I …(come) in. 2. My friend … (talk) to the teacher, when I … (see) him. 3. The boy … (fall) and … (hurt) himself while he … (ride) his bicycle. 4. She … (wait) for her sister when the rain … (start). 5. When the pupils … (hear) the bell, they … (get up) and … (leave). 6. While she … (play) the piano, I … (write) a letter. 7. He … (go) to the University when I … (meet) him. 8. Our friends … (discuss) something when we … (interrupt) them. 9. My mother … (watch) TV when I … (come) into the room. 10. When I … (look) out of the window, I … (see) that it … (rain) hard and people … (hurry) along the street. 11. We … (leave) the house when the telephone … (ring). 12. I … (sit) on the river bank when my friends … (join) me. 13. When I … (come) up to him, he … (speak) to his friends. 14. We … (meet) her when she … (walk) home. 15. When she … (enter) the room, I … (stand) at the window. 16. I … (watch) TV when somebody … (knock) at the door. 17. She … (water) the flowers while her husband … (watch) TV. 18. When we … (enter) the room, he … (smoke and look) at the picture. 19. What … you … (do), when I … (ring) you up yesterday? 20. As he … (cross) the street, he … (slip and fall).